diff --git a/cli/constants.js b/cli/constants.js
index 02b90d01..89e88623 100644
--- a/cli/constants.js
+++ b/cli/constants.js
@@ -3,8 +3,4 @@ const skip_command = Symbol("skip");
 
 const reservedOptions = ["version", "help"];
 
-module.exports = {
-  root_command,
-  skip_command,
-  reservedOptions,
-};
+export { root_command, skip_command, reservedOptions };
diff --git a/cli/execute.js b/cli/execute.js
index ee403844..e0bed487 100644
--- a/cli/execute.js
+++ b/cli/execute.js
@@ -1,7 +1,7 @@
-const _ = require("lodash");
-const { root_command, skip_command } = require("./constants");
-const { parseArgs } = require("./parse-args");
-const didYouMean = require("didyoumean");
+import didYouMean from "didyoumean";
+import _ from "lodash";
+import { root_command, skip_command } from "./constants.js";
+import { parseArgs } from "./parse-args.js";
 
 didYouMean.threshold = 0.5;
 
@@ -177,6 +177,4 @@ const processArgs = (commands, args) => {
   };
 };
 
-module.exports = {
-  execute,
-};
+export { execute };
diff --git a/cli/index.d.ts b/cli/index.d.ts
index 32e60d0a..d4fc8727 100644
--- a/cli/index.d.ts
+++ b/cli/index.d.ts
@@ -1,18 +1,19 @@
 type CliStructOption = {
-  flags?: string;
-  description?: string;
   default?: unknown;
+  description?: string;
+  flags?: string;
   internal?: { name?: string; formatter?: (value: any) => any };
+  required?: boolean;
 };
 
 type CliStruct = {
-  inherited?: string | null;
-  name?: string;
   alias?: string;
-  version?: string;
+  commands?: CliStruct[];
   description?: string;
+  inherited?: string | null;
+  name?: string;
   options: CliStructOption[];
-  commands?: CliStruct[];
+  version?: string;
 };
 
 type ExecuteOptions = {
diff --git a/cli/index.js b/cli/index.js
index 13e85d19..a5b818a5 100644
--- a/cli/index.js
+++ b/cli/index.js
@@ -1,9 +1,9 @@
-const _ = require("lodash");
-const { reservedOptions, root_command } = require("./constants");
-const { processOption } = require("./process-option");
-const { execute } = require("./execute");
-const { displayHelp } = require("./operations/display-help");
-const { displayVersion } = require("./operations/display-version");
+import _ from "lodash";
+import { reservedOptions, root_command } from "./constants.js";
+import { execute } from "./execute.js";
+import { displayHelp } from "./operations/display-help.js";
+import { displayVersion } from "./operations/display-version.js";
+import { processOption } from "./process-option.js";
 
 const cli = (input) => {
   const commands = {};
@@ -91,6 +91,4 @@ const cli = (input) => {
   return instance;
 };
 
-module.exports = {
-  cli,
-};
+export { cli };
diff --git a/cli/operations/display-help.js b/cli/operations/display-help.js
index 149209ea..f9d8beb2 100644
--- a/cli/operations/display-help.js
+++ b/cli/operations/display-help.js
@@ -1,5 +1,5 @@
-const _ = require("lodash");
-const { root_command } = require("../constants");
+import _ from "lodash";
+import { root_command } from "../constants.js";
 
 const generateOptionsOutput = (options) =>
   options.reduce(
@@ -174,6 +174,4 @@ ${command.description}`
 ${outputTest}`);
 };
 
-module.exports = {
-  displayHelp,
-};
+export { displayHelp };
diff --git a/cli/operations/display-version.js b/cli/operations/display-version.js
index 6e928acd..2a793e36 100644
--- a/cli/operations/display-version.js
+++ b/cli/operations/display-version.js
@@ -2,4 +2,4 @@ const displayVersion = (instance) => {
   console.log(instance.input.version);
 };
 
-module.exports = { displayVersion };
+export { displayVersion };
diff --git a/cli/parse-args.js b/cli/parse-args.js
index b99f14fc..405a6090 100644
--- a/cli/parse-args.js
+++ b/cli/parse-args.js
@@ -21,6 +21,4 @@ const parseArgs = (args, type) => {
   }
 };
 
-module.exports = {
-  parseArgs,
-};
+export { parseArgs };
diff --git a/cli/process-option.js b/cli/process-option.js
index 750ee67f..ab8a1de1 100644
--- a/cli/process-option.js
+++ b/cli/process-option.js
@@ -1,4 +1,4 @@
-const _ = require("lodash");
+import _ from "lodash";
 
 const optionFormatters = {
   number: (str) => +str,
@@ -72,6 +72,4 @@ const processOption = (option) => {
   };
 };
 
-module.exports = {
-  processOption,
-};
+export { processOption };
diff --git a/index.js b/index.js
index 90a27324..0be9904e 100755
--- a/index.js
+++ b/index.js
@@ -1,28 +1,23 @@
 #!/usr/bin/env node
 
-// Copyright (c) 2019-present acacode
-// Node module: swagger-typescript-api
-// This file is licensed under the MIT License.
-// License text available at https://opensource.org/licenses/MIT
-// Repository https://github.com/acacode/swagger-typescript-api
+import { createRequire } from "node:module";
+import { resolve } from "node:path";
+import { cli } from "./cli/index.js";
+import { TemplatesGenConfig } from "./src/commands/generate-templates/configuration.js";
+import { CodeGenConfig } from "./src/configuration.js";
+import { HTTP_CLIENT } from "./src/constants.js";
+import { generateApi, generateTemplates } from "./src/index.js";
 
-const { version, name } = require("./package.json");
-const { cli } = require("./cli");
-const { generateApi, generateTemplates } = require("./src");
-const { HTTP_CLIENT } = require("./src/constants");
-const { resolve } = require("node:path");
-const { CodeGenConfig } = require("./src/configuration");
-const {
-  TemplatesGenConfig,
-} = require("./src/commands/generate-templates/configuration");
+const require = createRequire(import.meta.url);
+const packageJson = require("./package.json");
 
 const codeGenBaseConfig = new CodeGenConfig({});
 const templateGenBaseConfig = new TemplatesGenConfig({});
 
 const program = cli({
-  name: name,
+  name: packageJson.name,
   alias: "sta",
-  version: version,
+  version: packageJson.version,
   description:
     "Generate api via swagger scheme.\nSupports OA 3.0, 2.0, JSON, yaml.",
   options: [
diff --git a/package.json b/package.json
index cc782d87..df02a2b1 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   "contributors": [
     "Sora Morimoto <sora@morimoto.io>"
   ],
+  "type": "module",
   "main": "./src/index.js",
   "types": "./index.d.ts",
   "bin": {
@@ -50,6 +51,8 @@
   },
   "devDependencies": {
     "@biomejs/biome": "1.8.2",
+    "@tsconfig/node18": "18.2.4",
+    "@tsconfig/strictest": "2.0.5",
     "@types/didyoumean": "1.2.2",
     "@types/js-yaml": "4.0.9",
     "@types/lodash": "4.17.5",
diff --git a/src/code-formatter.js b/src/code-formatter.js
index af585e46..619f8493 100644
--- a/src/code-formatter.js
+++ b/src/code-formatter.js
@@ -1,6 +1,6 @@
-const _ = require("lodash");
-const ts = require("typescript");
-const prettier = require("prettier");
+import _ from "lodash";
+import prettier from "prettier";
+import ts from "typescript";
 
 class CodeFormatter {
   /**
@@ -111,6 +111,4 @@ class TsLanguageServiceHost {
   }
 }
 
-module.exports = {
-  CodeFormatter,
-};
+export { CodeFormatter };
diff --git a/src/code-gen-process.js b/src/code-gen-process.js
index 1256c25d..712fe256 100644
--- a/src/code-gen-process.js
+++ b/src/code-gen-process.js
@@ -1,21 +1,21 @@
-const { SwaggerSchemaResolver } = require("./swagger-schema-resolver.js");
-const { SchemaComponentsMap } = require("./schema-components-map.js");
-const { NameResolver } = require("./util/name-resolver");
-const { Logger } = require("./util/logger.js");
-const { TypeNameFormatter } = require("./type-name-formatter.js");
-const _ = require("lodash");
-const { SchemaParserFabric } = require("./schema-parser/schema-parser-fabric");
-const { SchemaRoutes } = require("./schema-routes/schema-routes.js");
-const { CodeGenConfig } = require("./configuration.js");
-const { SchemaWalker } = require("./schema-walker");
-const { FileSystem } = require("./util/file-system");
-const { TemplatesWorker } = require("./templates-worker");
-const { JavascriptTranslator } = require("./translators/javascript");
-const ts = require("typescript");
-const { CodeFormatter } = require("./code-formatter");
-const { pascalCase } = require("./util/pascal-case");
-const { internalCase } = require("./util/internal-case");
-const { sortByProperty } = require("./util/sort-by-property");
+import _ from "lodash";
+import ts from "typescript";
+import { CodeFormatter } from "./code-formatter.js";
+import { CodeGenConfig } from "./configuration.js";
+import { SchemaComponentsMap } from "./schema-components-map.js";
+import { SchemaParserFabric } from "./schema-parser/schema-parser-fabric.js";
+import { SchemaRoutes } from "./schema-routes/schema-routes.js";
+import { SchemaWalker } from "./schema-walker.js";
+import { SwaggerSchemaResolver } from "./swagger-schema-resolver.js";
+import { TemplatesWorker } from "./templates-worker.js";
+import { JavascriptTranslator } from "./translators/javascript.js";
+import { TypeNameFormatter } from "./type-name-formatter.js";
+import { FileSystem } from "./util/file-system.js";
+import { internalCase } from "./util/internal-case.js";
+import { Logger } from "./util/logger.js";
+import { NameResolver } from "./util/name-resolver.js";
+import { pascalCase } from "./util/pascal-case.js";
+import { sortByProperty } from "./util/sort-by-property.js";
 
 const PATCHABLE_INSTANCES = [
   "schemaWalker",
@@ -566,6 +566,4 @@ class CodeGenProcess {
   };
 }
 
-module.exports = {
-  CodeGenProcess,
-};
+export { CodeGenProcess };
diff --git a/src/commands/generate-templates/configuration.js b/src/commands/generate-templates/configuration.js
index dd1529c2..1c595e63 100644
--- a/src/commands/generate-templates/configuration.js
+++ b/src/commands/generate-templates/configuration.js
@@ -1,5 +1,5 @@
-const { objectAssign } = require("../../util/object-assign");
-const { HTTP_CLIENT, PROJECT_VERSION } = require("../../constants");
+import { HTTP_CLIENT, PROJECT_VERSION } from "../../constants.js";
+import { objectAssign } from "../../util/object-assign.js";
 
 /**
  * @type {GenerateTemplatesParams}}
@@ -28,6 +28,4 @@ class TemplatesGenConfig {
   };
 }
 
-module.exports = {
-  TemplatesGenConfig,
-};
+export { TemplatesGenConfig };
diff --git a/src/commands/generate-templates/index.js b/src/commands/generate-templates/index.js
index d32283b1..fd674193 100644
--- a/src/commands/generate-templates/index.js
+++ b/src/commands/generate-templates/index.js
@@ -1,16 +1,10 @@
 #!/usr/bin/env node
 
-// Copyright (c) 2019-present acacode
-// Node module: swagger-typescript-api
-// This file is licensed under the MIT License.
-// License text available at https://opensource.org/licenses/MIT
-// Repository https://github.com/acacode/swagger-typescript-api
+import { TemplatesGenProcess } from "./templates-gen-process.js";
 
-const { TemplatesGenProcess } = require("./templates-gen-process");
+async function generateTemplates(config) {
+  const codeGenProcess = new TemplatesGenProcess(config);
+  return await codeGenProcess.start();
+}
 
-module.exports = {
-  generateTemplates: async (config) => {
-    const codeGenProcess = new TemplatesGenProcess(config);
-    return await codeGenProcess.start();
-  },
-};
+export { generateTemplates };
diff --git a/src/commands/generate-templates/templates-gen-process.js b/src/commands/generate-templates/templates-gen-process.js
index 15ba87f3..6fe22618 100644
--- a/src/commands/generate-templates/templates-gen-process.js
+++ b/src/commands/generate-templates/templates-gen-process.js
@@ -1,7 +1,10 @@
-const { TemplatesGenConfig } = require("./configuration");
-const { FileSystem } = require("../../util/file-system");
-const { Logger } = require("../../util/logger");
-const path = require("node:path");
+import path from "node:path";
+import url from "node:url";
+import { FileSystem } from "../../util/file-system.js";
+import { Logger } from "../../util/logger.js";
+import { TemplatesGenConfig } from "./configuration.js";
+
+const __dirname = path.dirname(url.fileURLToPath(import.meta.url));
 
 class TemplatesGenProcess {
   /**
@@ -199,6 +202,4 @@ class TemplatesGenProcess {
   };
 }
 
-module.exports = {
-  TemplatesGenProcess,
-};
+export { TemplatesGenProcess };
diff --git a/src/component-type-name-resolver.js b/src/component-type-name-resolver.js
index 63dde60d..080036bb 100644
--- a/src/component-type-name-resolver.js
+++ b/src/component-type-name-resolver.js
@@ -1,5 +1,5 @@
-const { getRandomInt } = require("./util/random");
-const { NameResolver } = require("./util/name-resolver");
+import { NameResolver } from "./util/name-resolver.js";
+import { getRandomInt } from "./util/random.js";
 
 class ComponentTypeNameResolver extends NameResolver {
   counter = 1;
@@ -39,6 +39,4 @@ class ComponentTypeNameResolver extends NameResolver {
   }
 }
 
-module.exports = {
-  ComponentTypeNameResolver,
-};
+export { ComponentTypeNameResolver };
diff --git a/src/configuration.js b/src/configuration.js
index 93d90b7b..15a6c53b 100644
--- a/src/configuration.js
+++ b/src/configuration.js
@@ -1,10 +1,9 @@
-/* eslint-disable no-unused-vars */
-const { objectAssign } = require("./util/object-assign");
-const _ = require("lodash");
-const CONSTANTS = require("./constants");
-const { ComponentTypeNameResolver } = require("./component-type-name-resolver");
-const { cosmiconfigSync } = require("cosmiconfig");
-const ts = require("typescript");
+import { cosmiconfigSync } from "cosmiconfig";
+import _ from "lodash";
+import ts from "typescript";
+import { ComponentTypeNameResolver } from "./component-type-name-resolver.js";
+import * as CONSTANTS from "./constants.js";
+import { objectAssign } from "./util/object-assign.js";
 
 const TsKeyword = {
   Number: "number",
@@ -443,6 +442,4 @@ const getDefaultPrettierOptions = () => {
   return { ...CONSTANTS.PRETTIER_OPTIONS };
 };
 
-module.exports = {
-  CodeGenConfig,
-};
+export { CodeGenConfig };
diff --git a/src/constants.js b/src/constants.js
index d6916fd5..f34b3a31 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -1,14 +1,51 @@
+import { createRequire } from "node:module";
+
+const require = createRequire(import.meta.url);
 const packageJson = require("../package.json");
-const RESERVED_QUERY_ARG_NAMES = ["query", "queryParams", "queryArg"];
+
+const DEFAULT_BODY_ARG_NAME = "data";
+
+const FILE_PREFIX = `/* eslint-disable */
+/* tslint:disable */
+/*
+ * ---------------------------------------------------------------
+ * ## THIS FILE WAS GENERATED VIA SWAGGER-TYPESCRIPT-API        ##
+ * ##                                                           ##
+ * ## AUTHOR: acacode                                           ##
+ * ## SOURCE: https://github.com/acacode/swagger-typescript-api ##
+ * ---------------------------------------------------------------
+ */
+
+`;
+
+const HTTP_CLIENT = {
+  FETCH: "fetch",
+  AXIOS: "axios",
+};
+
+const PRETTIER_OPTIONS = {
+  printWidth: 120,
+  tabWidth: 2,
+  trailingComma: "all",
+  parser: "typescript",
+};
+
+const PROJECT_VERSION = packageJson.version;
+
 const RESERVED_BODY_ARG_NAMES = ["data", "body", "reqBody"];
+
+const RESERVED_HEADER_ARG_NAMES = ["headers", "headersParams"];
+
+const RESERVED_PATH_ARG_NAMES = ["path", "pathParams"];
+
+const RESERVED_QUERY_ARG_NAMES = ["query", "queryParams", "queryArg"];
+
 const RESERVED_REQ_PARAMS_ARG_NAMES = [
   "params",
   "requestParams",
   "reqParams",
   "httpParams",
 ];
-const RESERVED_PATH_ARG_NAMES = ["path", "pathParams"];
-const RESERVED_HEADER_ARG_NAMES = ["headers", "headersParams"];
 
 const SCHEMA_TYPES = {
   ARRAY: "array",
@@ -25,41 +62,16 @@ const SCHEMA_TYPES = {
   COMPLEX_UNKNOWN: "__unknown",
 };
 
-const HTTP_CLIENT = {
-  FETCH: "fetch",
-  AXIOS: "axios",
-};
-
-const PROJECT_VERSION = packageJson.version;
-
-const FILE_PREFIX = `/* eslint-disable */
-/* tslint:disable */
-/*
- * ---------------------------------------------------------------
- * ## THIS FILE WAS GENERATED VIA SWAGGER-TYPESCRIPT-API        ##
- * ##                                                           ##
- * ## AUTHOR: acacode                                           ##
- * ## SOURCE: https://github.com/acacode/swagger-typescript-api ##
- * ---------------------------------------------------------------
- */
-
-`;
-
-module.exports = {
+export {
+  DEFAULT_BODY_ARG_NAME,
   FILE_PREFIX,
-  DEFAULT_BODY_ARG_NAME: "data",
-  PROJECT_VERSION,
-  SCHEMA_TYPES,
   HTTP_CLIENT,
-  RESERVED_QUERY_ARG_NAMES,
+  PRETTIER_OPTIONS,
+  PROJECT_VERSION,
   RESERVED_BODY_ARG_NAMES,
-  RESERVED_REQ_PARAMS_ARG_NAMES,
-  RESERVED_PATH_ARG_NAMES,
   RESERVED_HEADER_ARG_NAMES,
-  PRETTIER_OPTIONS: {
-    printWidth: 120,
-    tabWidth: 2,
-    trailingComma: "all",
-    parser: "typescript",
-  },
+  RESERVED_PATH_ARG_NAMES,
+  RESERVED_QUERY_ARG_NAMES,
+  RESERVED_REQ_PARAMS_ARG_NAMES,
+  SCHEMA_TYPES,
 };
diff --git a/src/index.js b/src/index.js
index e8950158..140a70de 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,26 +1,16 @@
 #!/usr/bin/env node
 
-// Copyright (c) 2019-present acacode
-// Node module: swagger-typescript-api
-// This file is licensed under the MIT License.
-// License text available at https://opensource.org/licenses/MIT
-// Repository https://github.com/acacode/swagger-typescript-api
+import { CodeGenProcess } from "./code-gen-process.js";
+import { generateTemplates } from "./commands/generate-templates/index.js";
+import * as constants from "./constants.js";
 
-const constants = require("./constants");
-const { CodeGenProcess } = require("./code-gen-process.js");
-const { generateTemplates } = require("./commands/generate-templates");
+async function generateApi({ name, prettier, ...config }) {
+  const codeGenProcess = new CodeGenProcess({
+    ...config,
+    fileName: name,
+    prettierOptions: prettier,
+  });
+  return await codeGenProcess.start();
+}
 
-module.exports = {
-  constants: constants,
-  generateApi: async ({ name, prettier, ...config }) => {
-    const codeGenProcess = new CodeGenProcess({
-      ...config,
-      fileName: name,
-      prettierOptions: prettier,
-    });
-    return await codeGenProcess.start();
-  },
-  generateTemplates: async (config) => {
-    return await generateTemplates(config);
-  },
-};
+export { constants, generateApi, generateTemplates };
diff --git a/src/schema-components-map.js b/src/schema-components-map.js
index d196636c..f0b6130b 100644
--- a/src/schema-components-map.js
+++ b/src/schema-components-map.js
@@ -1,4 +1,4 @@
-const _ = require("lodash");
+import _ from "lodash";
 
 class SchemaComponentsMap {
   /** @type {SchemaComponent[]} */
@@ -73,6 +73,4 @@ class SchemaComponentsMap {
   }
 }
 
-module.exports = {
-  SchemaComponentsMap,
-};
+export { SchemaComponentsMap };
diff --git a/src/schema-parser/base-schema-parsers/array.js b/src/schema-parser/base-schema-parsers/array.js
index 7245ca11..073386e8 100644
--- a/src/schema-parser/base-schema-parsers/array.js
+++ b/src/schema-parser/base-schema-parsers/array.js
@@ -1,6 +1,6 @@
-const { MonoSchemaParser } = require("../mono-schema-parser");
-const _ = require("lodash");
-const { SCHEMA_TYPES } = require("../../constants");
+import _ from "lodash";
+import { SCHEMA_TYPES } from "../../constants.js";
+import { MonoSchemaParser } from "../mono-schema-parser.js";
 
 class ArraySchemaParser extends MonoSchemaParser {
   parse() {
@@ -38,6 +38,4 @@ class ArraySchemaParser extends MonoSchemaParser {
   }
 }
 
-module.exports = {
-  ArraySchemaParser,
-};
+export { ArraySchemaParser };
diff --git a/src/schema-parser/base-schema-parsers/complex.js b/src/schema-parser/base-schema-parsers/complex.js
index 49a46f28..08d15c49 100644
--- a/src/schema-parser/base-schema-parsers/complex.js
+++ b/src/schema-parser/base-schema-parsers/complex.js
@@ -1,6 +1,6 @@
-const { MonoSchemaParser } = require("../mono-schema-parser");
-const _ = require("lodash");
-const { SCHEMA_TYPES } = require("../../constants");
+import _ from "lodash";
+import { SCHEMA_TYPES } from "../../constants.js";
+import { MonoSchemaParser } from "../mono-schema-parser.js";
 
 class ComplexSchemaParser extends MonoSchemaParser {
   parse() {
@@ -46,6 +46,4 @@ class ComplexSchemaParser extends MonoSchemaParser {
   }
 }
 
-module.exports = {
-  ComplexSchemaParser,
-};
+export { ComplexSchemaParser };
diff --git a/src/schema-parser/base-schema-parsers/discriminator.js b/src/schema-parser/base-schema-parsers/discriminator.js
index f28f6bea..49f48744 100644
--- a/src/schema-parser/base-schema-parsers/discriminator.js
+++ b/src/schema-parser/base-schema-parsers/discriminator.js
@@ -1,6 +1,6 @@
-const _ = require("lodash");
-const { SCHEMA_TYPES } = require("../../constants");
-const { MonoSchemaParser } = require("../mono-schema-parser");
+import _ from "lodash";
+import { SCHEMA_TYPES } from "../../constants.js";
+import { MonoSchemaParser } from "../mono-schema-parser.js";
 
 class DiscriminatorSchemaParser extends MonoSchemaParser {
   parse() {
@@ -302,6 +302,4 @@ class DiscriminatorSchemaParser extends MonoSchemaParser {
   };
 }
 
-module.exports = {
-  DiscriminatorSchemaParser,
-};
+export { DiscriminatorSchemaParser };
diff --git a/src/schema-parser/base-schema-parsers/enum.js b/src/schema-parser/base-schema-parsers/enum.js
index 98a05545..2be35842 100644
--- a/src/schema-parser/base-schema-parsers/enum.js
+++ b/src/schema-parser/base-schema-parsers/enum.js
@@ -1,7 +1,7 @@
-const { MonoSchemaParser } = require("../mono-schema-parser");
-const _ = require("lodash");
-const { SCHEMA_TYPES } = require("../../constants");
-const { EnumKeyResolver } = require("../util/enum-key-resolver");
+import _ from "lodash";
+import { SCHEMA_TYPES } from "../../constants.js";
+import { MonoSchemaParser } from "../mono-schema-parser.js";
+import { EnumKeyResolver } from "../util/enum-key-resolver.js";
 
 class EnumSchemaParser extends MonoSchemaParser {
   /** @type {EnumKeyResolver} */
@@ -153,6 +153,4 @@ class EnumSchemaParser extends MonoSchemaParser {
   };
 }
 
-module.exports = {
-  EnumSchemaParser,
-};
+export { EnumSchemaParser };
diff --git a/src/schema-parser/base-schema-parsers/object.js b/src/schema-parser/base-schema-parsers/object.js
index 53fb7815..dae84bde 100644
--- a/src/schema-parser/base-schema-parsers/object.js
+++ b/src/schema-parser/base-schema-parsers/object.js
@@ -1,6 +1,6 @@
-const { MonoSchemaParser } = require("../mono-schema-parser");
-const _ = require("lodash");
-const { SCHEMA_TYPES } = require("../../constants");
+import _ from "lodash";
+import { SCHEMA_TYPES } from "../../constants.js";
+import { MonoSchemaParser } from "../mono-schema-parser.js";
 
 class ObjectSchemaParser extends MonoSchemaParser {
   parse() {
@@ -100,6 +100,4 @@ class ObjectSchemaParser extends MonoSchemaParser {
   };
 }
 
-module.exports = {
-  ObjectSchemaParser,
-};
+export { ObjectSchemaParser };
diff --git a/src/schema-parser/base-schema-parsers/primitive.js b/src/schema-parser/base-schema-parsers/primitive.js
index 3a01962d..fe3db0ac 100644
--- a/src/schema-parser/base-schema-parsers/primitive.js
+++ b/src/schema-parser/base-schema-parsers/primitive.js
@@ -1,6 +1,6 @@
-const { MonoSchemaParser } = require("../mono-schema-parser");
-const _ = require("lodash");
-const { SCHEMA_TYPES } = require("../../constants");
+import _ from "lodash";
+import { SCHEMA_TYPES } from "../../constants.js";
+import { MonoSchemaParser } from "../mono-schema-parser.js";
 
 class PrimitiveSchemaParser extends MonoSchemaParser {
   parse() {
@@ -58,6 +58,4 @@ class PrimitiveSchemaParser extends MonoSchemaParser {
   }
 }
 
-module.exports = {
-  PrimitiveSchemaParser,
-};
+export { PrimitiveSchemaParser };
diff --git a/src/schema-parser/complex-schema-parsers/all-of.js b/src/schema-parser/complex-schema-parsers/all-of.js
index 8992c5fc..d0487022 100644
--- a/src/schema-parser/complex-schema-parsers/all-of.js
+++ b/src/schema-parser/complex-schema-parsers/all-of.js
@@ -1,5 +1,5 @@
-const { MonoSchemaParser } = require("../mono-schema-parser");
-const _ = require("lodash");
+import _ from "lodash";
+import { MonoSchemaParser } from "../mono-schema-parser.js";
 
 // T1 & T2
 class AllOfSchemaParser extends MonoSchemaParser {
@@ -23,4 +23,4 @@ class AllOfSchemaParser extends MonoSchemaParser {
   }
 }
 
-module.exports = { AllOfSchemaParser };
+export { AllOfSchemaParser };
diff --git a/src/schema-parser/complex-schema-parsers/any-of.js b/src/schema-parser/complex-schema-parsers/any-of.js
index 667c307f..5f83e6d0 100644
--- a/src/schema-parser/complex-schema-parsers/any-of.js
+++ b/src/schema-parser/complex-schema-parsers/any-of.js
@@ -1,5 +1,5 @@
-const { MonoSchemaParser } = require("../mono-schema-parser");
-const _ = require("lodash");
+import _ from "lodash";
+import { MonoSchemaParser } from "../mono-schema-parser.js";
 
 // T1 | T2
 class AnyOfSchemaParser extends MonoSchemaParser {
@@ -24,4 +24,4 @@ class AnyOfSchemaParser extends MonoSchemaParser {
   }
 }
 
-module.exports = { AnyOfSchemaParser };
+export { AnyOfSchemaParser };
diff --git a/src/schema-parser/complex-schema-parsers/not.js b/src/schema-parser/complex-schema-parsers/not.js
index cc6bfddd..1fb94363 100644
--- a/src/schema-parser/complex-schema-parsers/not.js
+++ b/src/schema-parser/complex-schema-parsers/not.js
@@ -1,4 +1,4 @@
-const { MonoSchemaParser } = require("../mono-schema-parser");
+import { MonoSchemaParser } from "../mono-schema-parser.js";
 
 class NotSchemaParser extends MonoSchemaParser {
   parse() {
@@ -6,4 +6,4 @@ class NotSchemaParser extends MonoSchemaParser {
   }
 }
 
-module.exports = { NotSchemaParser };
+export { NotSchemaParser };
diff --git a/src/schema-parser/complex-schema-parsers/one-of.js b/src/schema-parser/complex-schema-parsers/one-of.js
index 58117de0..f5c3247c 100644
--- a/src/schema-parser/complex-schema-parsers/one-of.js
+++ b/src/schema-parser/complex-schema-parsers/one-of.js
@@ -1,5 +1,5 @@
-const { MonoSchemaParser } = require("../mono-schema-parser");
-const _ = require("lodash");
+import _ from "lodash";
+import { MonoSchemaParser } from "../mono-schema-parser.js";
 
 // T1 | T2
 class OneOfSchemaParser extends MonoSchemaParser {
@@ -24,4 +24,4 @@ class OneOfSchemaParser extends MonoSchemaParser {
   }
 }
 
-module.exports = { OneOfSchemaParser };
+export { OneOfSchemaParser };
diff --git a/src/schema-parser/mono-schema-parser.js b/src/schema-parser/mono-schema-parser.js
index f5d6e0d3..b53132c0 100644
--- a/src/schema-parser/mono-schema-parser.js
+++ b/src/schema-parser/mono-schema-parser.js
@@ -43,6 +43,4 @@ class MonoSchemaParser {
   };
 }
 
-module.exports = {
-  MonoSchemaParser,
-};
+export { MonoSchemaParser };
diff --git a/src/schema-parser/schema-formatters.js b/src/schema-parser/schema-formatters.js
index d1c65da4..88151d8b 100644
--- a/src/schema-parser/schema-formatters.js
+++ b/src/schema-parser/schema-formatters.js
@@ -1,5 +1,5 @@
-const { SCHEMA_TYPES } = require("../constants");
-const _ = require("lodash");
+import _ from "lodash";
+import { SCHEMA_TYPES } from "../constants.js";
 
 class SchemaFormatters {
   /** @type {CodeGenConfig} */
@@ -161,6 +161,4 @@ class SchemaFormatters {
   };
 }
 
-module.exports = {
-  SchemaFormatters,
-};
+export { SchemaFormatters };
diff --git a/src/schema-parser/schema-parser-fabric.js b/src/schema-parser/schema-parser-fabric.js
index 044aa2c4..2f93d8d3 100644
--- a/src/schema-parser/schema-parser-fabric.js
+++ b/src/schema-parser/schema-parser-fabric.js
@@ -1,7 +1,7 @@
-const _ = require("lodash");
-const { SchemaFormatters } = require("./schema-formatters");
-const { SchemaUtils } = require("./schema-utils");
-const { SchemaParser } = require("./schema-parser");
+import _ from "lodash";
+import { SchemaFormatters } from "./schema-formatters.js";
+import { SchemaParser } from "./schema-parser.js";
+import { SchemaUtils } from "./schema-utils.js";
 
 class SchemaParserFabric {
   /** @type {CodeGenConfig} */
@@ -127,6 +127,4 @@ class SchemaParserFabric {
   };
 }
 
-module.exports = {
-  SchemaParserFabric,
-};
+export { SchemaParserFabric };
diff --git a/src/schema-parser/schema-parser.js b/src/schema-parser/schema-parser.js
index 6b4cd7ad..bd8ec092 100644
--- a/src/schema-parser/schema-parser.js
+++ b/src/schema-parser/schema-parser.js
@@ -1,21 +1,18 @@
-/* eslint-disable no-unused-vars */
-const { SCHEMA_TYPES } = require("../constants.js");
-const _ = require("lodash");
-const { SchemaFormatters } = require("./schema-formatters");
-const { SchemaUtils } = require("./schema-utils");
-const {
-  DiscriminatorSchemaParser,
-} = require("./base-schema-parsers/discriminator");
-const { EnumSchemaParser } = require("./base-schema-parsers/enum");
-const { ObjectSchemaParser } = require("./base-schema-parsers/object");
-const { PrimitiveSchemaParser } = require("./base-schema-parsers/primitive");
-const { ComplexSchemaParser } = require("./base-schema-parsers/complex");
-const { OneOfSchemaParser } = require("./complex-schema-parsers/one-of");
-const { AllOfSchemaParser } = require("./complex-schema-parsers/all-of");
-const { AnyOfSchemaParser } = require("./complex-schema-parsers/any-of");
-const { NotSchemaParser } = require("./complex-schema-parsers/not");
-const { ArraySchemaParser } = require("./base-schema-parsers/array");
-const { sortByProperty } = require("../util/sort-by-property");
+import _ from "lodash";
+import { SCHEMA_TYPES } from "../constants.js";
+import { sortByProperty } from "../util/sort-by-property.js";
+import { ArraySchemaParser } from "./base-schema-parsers/array.js";
+import { ComplexSchemaParser } from "./base-schema-parsers/complex.js";
+import { DiscriminatorSchemaParser } from "./base-schema-parsers/discriminator.js";
+import { EnumSchemaParser } from "./base-schema-parsers/enum.js";
+import { ObjectSchemaParser } from "./base-schema-parsers/object.js";
+import { PrimitiveSchemaParser } from "./base-schema-parsers/primitive.js";
+import { AllOfSchemaParser } from "./complex-schema-parsers/all-of.js";
+import { AnyOfSchemaParser } from "./complex-schema-parsers/any-of.js";
+import { NotSchemaParser } from "./complex-schema-parsers/not.js";
+import { OneOfSchemaParser } from "./complex-schema-parsers/one-of.js";
+import { SchemaFormatters } from "./schema-formatters.js";
+import { SchemaUtils } from "./schema-utils.js";
 
 class SchemaParser {
   /** @type {SchemaParserFabric} */
@@ -295,6 +292,4 @@ class SchemaParser {
   };
 }
 
-module.exports = {
-  SchemaParser,
-};
+export { SchemaParser };
diff --git a/src/schema-parser/schema-utils.js b/src/schema-parser/schema-utils.js
index ddf058d1..1b155e05 100644
--- a/src/schema-parser/schema-utils.js
+++ b/src/schema-parser/schema-utils.js
@@ -1,8 +1,7 @@
-const _ = require("lodash");
-const { SCHEMA_TYPES } = require("../constants");
-const { internalCase } = require("../util/internal-case");
-const { pascalCase } = require("../util/pascal-case");
-const { camelCase } = require("lodash");
+import _ from "lodash";
+import { SCHEMA_TYPES } from "../constants.js";
+import { internalCase } from "../util/internal-case.js";
+import { pascalCase } from "../util/pascal-case.js";
 
 class SchemaUtils {
   /** @type {CodeGenConfig} */
@@ -285,7 +284,7 @@ class SchemaUtils {
     if (!schemaPath || !schemaPath[0]) return null;
 
     return pascalCase(
-      camelCase(
+      _.camelCase(
         _.uniq([schemaPath[0], schemaPath[schemaPath.length - 1]]).join("_"),
       ),
     );
@@ -317,6 +316,4 @@ class SchemaUtils {
   };
 }
 
-module.exports = {
-  SchemaUtils,
-};
+export { SchemaUtils };
diff --git a/src/schema-parser/util/enum-key-resolver.js b/src/schema-parser/util/enum-key-resolver.js
index b609e5fa..844c9c51 100644
--- a/src/schema-parser/util/enum-key-resolver.js
+++ b/src/schema-parser/util/enum-key-resolver.js
@@ -1,4 +1,4 @@
-const { NameResolver } = require("../../util/name-resolver");
+import { NameResolver } from "../../util/name-resolver.js";
 
 class EnumKeyResolver extends NameResolver {
   counter = 1;
@@ -21,6 +21,4 @@ class EnumKeyResolver extends NameResolver {
   }
 }
 
-module.exports = {
-  EnumKeyResolver,
-};
+export { EnumKeyResolver };
diff --git a/src/schema-routes/schema-routes.js b/src/schema-routes/schema-routes.js
index b94a00f7..9ac07d0b 100644
--- a/src/schema-routes/schema-routes.js
+++ b/src/schema-routes/schema-routes.js
@@ -1,16 +1,13 @@
-const _ = require("lodash");
-const { generateId } = require("../util/id.js");
-const {
-  SpecificArgNameResolver,
-} = require("./util/specific-arg-name-resolver");
-const {
+import _ from "lodash";
+import {
   DEFAULT_BODY_ARG_NAME,
   RESERVED_BODY_ARG_NAMES,
   RESERVED_HEADER_ARG_NAMES,
   RESERVED_PATH_ARG_NAMES,
   RESERVED_QUERY_ARG_NAMES,
-} = require("../constants.js");
-const { camelCase } = require("lodash");
+} from "../constants.js";
+import { generateId } from "../util/id.js";
+import { SpecificArgNameResolver } from "./util/specific-arg-name-resolver.js";
 
 const CONTENT_KIND = {
   JSON: "JSON",
@@ -540,7 +537,7 @@ class SchemaRoutes {
         let usageName = `${schemaPart.name}`;
 
         if (usageName.includes(".")) {
-          usageName = camelCase(usageName);
+          usageName = _.camelCase(usageName);
         }
 
         return {
@@ -1208,6 +1205,4 @@ class SchemaRoutes {
   };
 }
 
-module.exports = {
-  SchemaRoutes,
-};
+export { SchemaRoutes };
diff --git a/src/schema-routes/util/specific-arg-name-resolver.js b/src/schema-routes/util/specific-arg-name-resolver.js
index cd624f46..2adee8da 100644
--- a/src/schema-routes/util/specific-arg-name-resolver.js
+++ b/src/schema-routes/util/specific-arg-name-resolver.js
@@ -1,4 +1,4 @@
-const { NameResolver } = require("../../util/name-resolver");
+import { NameResolver } from "../../util/name-resolver.js";
 
 class SpecificArgNameResolver extends NameResolver {
   counter = 1;
@@ -21,6 +21,4 @@ class SpecificArgNameResolver extends NameResolver {
   }
 }
 
-module.exports = {
-  SpecificArgNameResolver,
-};
+export { SpecificArgNameResolver };
diff --git a/src/schema-walker.js b/src/schema-walker.js
index e2055c31..7fd922f9 100644
--- a/src/schema-walker.js
+++ b/src/schema-walker.js
@@ -1,4 +1,4 @@
-const _ = require("lodash");
+import _ from "lodash";
 
 // TODO: WIP
 // this class will be needed to walk by schema everywhere
@@ -88,6 +88,4 @@ class SchemaWalker {
   };
 }
 
-module.exports = {
-  SchemaWalker,
-};
+export { SchemaWalker };
diff --git a/src/swagger-schema-resolver.js b/src/swagger-schema-resolver.js
index 1196650f..b79cd85a 100644
--- a/src/swagger-schema-resolver.js
+++ b/src/swagger-schema-resolver.js
@@ -1,7 +1,7 @@
-const _ = require("lodash");
-const converter = require("swagger2openapi");
-const yaml = require("js-yaml");
-const { Request } = require("./util/request");
+import yaml from "js-yaml";
+import _ from "lodash";
+import converter from "swagger2openapi";
+import { Request } from "./util/request.js";
 
 class SwaggerSchemaResolver {
   /**
@@ -192,6 +192,4 @@ class SwaggerSchemaResolver {
   }
 }
 
-module.exports = {
-  SwaggerSchemaResolver,
-};
+export { SwaggerSchemaResolver };
diff --git a/src/templates-worker.js b/src/templates-worker.js
index 9d4e3214..9b834f0a 100644
--- a/src/templates-worker.js
+++ b/src/templates-worker.js
@@ -1,7 +1,8 @@
-const { resolve } = require("node:path");
-const _ = require("lodash");
-const Eta = require("eta");
-const path = require("node:path");
+import { resolve } from "node:path";
+import path from "node:path";
+import url from "node:url";
+import * as Eta from "eta";
+import _ from "lodash";
 
 class TemplatesWorker {
   /**
@@ -34,6 +35,7 @@ class TemplatesWorker {
    * @returns {CodeGenConfig.templatePaths}
    */
   getTemplatePaths = (config) => {
+    const __dirname = path.dirname(url.fileURLToPath(import.meta.url));
     const baseTemplatesPath = resolve(__dirname, "../templates/base");
     const defaultTemplatesPath = resolve(__dirname, "../templates/default");
     const modularTemplatesPath = resolve(__dirname, "../templates/modular");
@@ -238,6 +240,4 @@ class TemplatesWorker {
   };
 }
 
-module.exports = {
-  TemplatesWorker,
-};
+export { TemplatesWorker };
diff --git a/src/translators/javascript.js b/src/translators/javascript.js
index 133980fc..f90f0d14 100644
--- a/src/translators/javascript.js
+++ b/src/translators/javascript.js
@@ -1,5 +1,5 @@
-const ts = require("typescript");
-const { Translator } = require("./translator");
+import ts from "typescript";
+import { Translator } from "./translator.js";
 
 class JavascriptTranslator extends Translator {
   /**
@@ -78,6 +78,4 @@ class JavascriptTranslator extends Translator {
   };
 }
 
-module.exports = {
-  JavascriptTranslator,
-};
+export { JavascriptTranslator };
diff --git a/src/translators/translator.js b/src/translators/translator.js
index 1d68168e..8c4ecc64 100644
--- a/src/translators/translator.js
+++ b/src/translators/translator.js
@@ -30,6 +30,4 @@ class Translator {
   }
 }
 
-module.exports = {
-  Translator,
-};
+export { Translator };
diff --git a/src/type-name-formatter.js b/src/type-name-formatter.js
index f8806471..a5ed4b8a 100644
--- a/src/type-name-formatter.js
+++ b/src/type-name-formatter.js
@@ -1,4 +1,4 @@
-const _ = require("lodash");
+import _ from "lodash";
 
 /**
  * @typedef {"enum-key" | "type-name"} FormattingSchemaType
@@ -108,6 +108,4 @@ class TypeNameFormatter {
   };
 }
 
-module.exports = {
-  TypeNameFormatter,
-};
+export { TypeNameFormatter };
diff --git a/src/util/file-system.js b/src/util/file-system.js
index 15ea38bd..dfb1d472 100644
--- a/src/util/file-system.js
+++ b/src/util/file-system.js
@@ -1,7 +1,8 @@
-const fs = require("node:fs");
-const { resolve } = require("node:path");
-const _ = require("lodash");
-const { Logger } = require("./logger");
+import fs from "node:fs";
+import { dirname, resolve } from "node:path";
+import url from "node:url";
+import _ from "lodash";
+import { Logger } from "./logger.js";
 
 const FILE_PREFIX = `/* eslint-disable */
 /* tslint:disable */
@@ -83,6 +84,7 @@ class FileSystem {
   };
 
   createFile = ({ path, fileName, content, withPrefix }) => {
+    const __dirname = dirname(url.fileURLToPath(import.meta.url));
     const absolutePath = resolve(__dirname, path, `./${fileName}`);
     const fileContent = `${withPrefix ? FILE_PREFIX : ""}${content}`;
 
@@ -90,6 +92,4 @@ class FileSystem {
   };
 }
 
-module.exports = {
-  FileSystem,
-};
+export { FileSystem };
diff --git a/src/util/id.js b/src/util/id.js
index d4c6b30e..043dadab 100644
--- a/src/util/id.js
+++ b/src/util/id.js
@@ -1,9 +1,7 @@
-const { customAlphabet } = require("nanoid");
+import { customAlphabet } from "nanoid";
 
 const ALPHABET = "abcdefghijklmnopqrstuvwxyz0123456789";
 
 const generateId = customAlphabet(ALPHABET, 12);
 
-module.exports = {
-  generateId,
-};
+export { generateId };
diff --git a/src/util/internal-case.js b/src/util/internal-case.js
index 81ae2b60..78c2aa5b 100644
--- a/src/util/internal-case.js
+++ b/src/util/internal-case.js
@@ -1,5 +1,7 @@
-const _ = require("lodash");
+import _ from "lodash";
 
-module.exports = {
-  internalCase: (value) => _.camelCase(_.lowerCase(value)),
-};
+function internalCase(value) {
+  return _.camelCase(_.lowerCase(value));
+}
+
+export { internalCase };
diff --git a/src/util/logger.js b/src/util/logger.js
index 52119a8f..f671d528 100644
--- a/src/util/logger.js
+++ b/src/util/logger.js
@@ -1,5 +1,5 @@
-const { emojify } = require("node-emoji");
-const _ = require("lodash");
+import _ from "lodash";
+import { emojify } from "node-emoji";
 
 class Logger {
   firstLog = true;
@@ -139,6 +139,4 @@ class Logger {
   };
 }
 
-module.exports = {
-  Logger,
-};
+export { Logger };
diff --git a/src/util/name-resolver.js b/src/util/name-resolver.js
index 5c816407..8d0ca42f 100644
--- a/src/util/name-resolver.js
+++ b/src/util/name-resolver.js
@@ -1,4 +1,4 @@
-const _ = require("lodash");
+import _ from "lodash";
 
 class NameResolver {
   reservedNames = [];
@@ -100,6 +100,4 @@ class NameResolver {
   }
 }
 
-module.exports = {
-  NameResolver,
-};
+export { NameResolver };
diff --git a/src/util/object-assign.js b/src/util/object-assign.js
index 365c5a18..3eaff3a8 100644
--- a/src/util/object-assign.js
+++ b/src/util/object-assign.js
@@ -1,4 +1,4 @@
-const _ = require("lodash");
+import _ from "lodash";
 
 const objectAssign = (target, updaterFn) => {
   if (!updaterFn) return;
@@ -14,6 +14,4 @@ const objectAssign = (target, updaterFn) => {
   });
 };
 
-module.exports = {
-  objectAssign,
-};
+export { objectAssign };
diff --git a/src/util/pascal-case.js b/src/util/pascal-case.js
index 1bb41c49..eb6b37d9 100644
--- a/src/util/pascal-case.js
+++ b/src/util/pascal-case.js
@@ -1,5 +1,7 @@
-const _ = require("lodash");
+import _ from "lodash";
 
-module.exports = {
-  pascalCase: (value) => _.upperFirst(_.camelCase(value)),
-};
+function pascalCase(value) {
+  return _.upperFirst(_.camelCase(value));
+}
+
+export { pascalCase };
diff --git a/src/util/random.js b/src/util/random.js
index 046e3ec6..31fef748 100644
--- a/src/util/random.js
+++ b/src/util/random.js
@@ -8,7 +8,4 @@ const getRandomInt = (min = 0, max = 1) => {
   return Math.round(getRandomFloat(min, max));
 };
 
-module.exports = {
-  getRandomInt,
-  getRandomFloat,
-};
+export { getRandomInt, getRandomFloat };
diff --git a/src/util/request.js b/src/util/request.js
index 870d7647..2efa39ee 100644
--- a/src/util/request.js
+++ b/src/util/request.js
@@ -1,4 +1,4 @@
-const _ = require("lodash");
+import _ from "lodash";
 
 class Request {
   /**
@@ -60,6 +60,4 @@ class Request {
   }
 }
 
-module.exports = {
-  Request,
-};
+export { Request };
diff --git a/src/util/sort-by-property.js b/src/util/sort-by-property.js
index 69def8e9..82dd85a5 100644
--- a/src/util/sort-by-property.js
+++ b/src/util/sort-by-property.js
@@ -12,6 +12,4 @@ const sortByProperty = (propertyName) => (o1, o2) => {
   return 0;
 };
 
-module.exports = {
-  sortByProperty,
-};
+export { sortByProperty };
diff --git a/tests/extended.test.ts b/tests/extended.test.ts
index f9d36b8d..a13394b5 100644
--- a/tests/extended.test.ts
+++ b/tests/extended.test.ts
@@ -21,7 +21,6 @@ describe("extended", async () => {
   const schemas = await collectAllSchemas();
 
   test.each(schemas)("$name", async (schema) => {
-    // @ts-expect-error
     await generateApi({
       name: schema.name,
       input: schema.filePath,
diff --git a/tests/simple.test.ts b/tests/simple.test.ts
index 71d8b32e..5acd14f7 100644
--- a/tests/simple.test.ts
+++ b/tests/simple.test.ts
@@ -21,7 +21,6 @@ describe("simple", async () => {
   const schemas = await collectAllSchemas();
 
   test.each(schemas)("$name", async (schema) => {
-    // @ts-expect-error
     await generateApi({
       name: schema.name,
       input: schema.filePath,
diff --git a/tests/spec/additional-properties-2.0/basic.test.ts b/tests/spec/additional-properties-2.0/basic.test.ts
index c301edc6..ac1ec590 100644
--- a/tests/spec/additional-properties-2.0/basic.test.ts
+++ b/tests/spec/additional-properties-2.0/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("additional properties 2.0", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       addReadonly: true,
diff --git a/tests/spec/another-array-type/basic.test.ts b/tests/spec/another-array-type/basic.test.ts
index 269b1119..aa74320d 100644
--- a/tests/spec/another-array-type/basic.test.ts
+++ b/tests/spec/another-array-type/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--another-array-type", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       anotherArrayType: true,
diff --git a/tests/spec/another-query-params/basic.test.ts b/tests/spec/another-query-params/basic.test.ts
index 87eefd1e..c08abad8 100644
--- a/tests/spec/another-query-params/basic.test.ts
+++ b/tests/spec/another-query-params/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("another-query-params", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: true,
diff --git a/tests/spec/axios/basic.test.ts b/tests/spec/axios/basic.test.ts
index 9f470706..e0d180d5 100644
--- a/tests/spec/axios/basic.test.ts
+++ b/tests/spec/axios/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--axios option", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: true,
diff --git a/tests/spec/axiosSingleHttpClient/basic.test.ts b/tests/spec/axiosSingleHttpClient/basic.test.ts
index 935fc376..9145872b 100644
--- a/tests/spec/axiosSingleHttpClient/basic.test.ts
+++ b/tests/spec/axiosSingleHttpClient/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--axios --single-http-client", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: true,
diff --git a/tests/spec/cli/schema.json b/tests/spec/cli/schema.json
deleted file mode 100644
index 8c57124b..00000000
--- a/tests/spec/cli/schema.json
+++ /dev/null
@@ -1,779 +0,0 @@
-{
-  "swagger": "2.0",
-  "schemes": ["https"],
-  "host": "6-dot-authentiqio.appspot.com",
-  "basePath": "/",
-  "info": {
-    "contact": {
-      "email": "hello@authentiq.com",
-      "name": "Authentiq team",
-      "url": "http://authentiq.io/support"
-    },
-    "description": "Strong authentication, without the passwords.",
-    "license": {
-      "name": "Apache 2.0",
-      "url": "http://www.apache.org/licenses/LICENSE-2.0.html"
-    },
-    "termsOfService": "http://authentiq.com/terms/",
-    "title": "Authentiq",
-    "version": "6",
-    "x-apisguru-categories": ["security"],
-    "x-logo": {
-      "backgroundColor": "#F26641",
-      "url": "https://api.apis.guru/v2/cache/logo/https_www.authentiq.com_theme_images_authentiq-logo-a-inverse.svg"
-    },
-    "x-origin": [
-      {
-        "format": "swagger",
-        "url": "https://raw.githubusercontent.com/AuthentiqID/authentiq-docs/master/docs/swagger/issuer.yaml",
-        "version": "2.0"
-      }
-    ],
-    "x-preferred": true,
-    "x-providerName": "6-dot-authentiqio.appspot.com"
-  },
-  "parameters": {
-    "AuthentiqID": {
-      "description": "Authentiq ID to register",
-      "in": "body",
-      "name": "body",
-      "required": true,
-      "schema": {
-        "$ref": "#/definitions/AuthentiqID"
-      }
-    },
-    "JobID": {
-      "description": "Job ID (20 chars)",
-      "in": "path",
-      "name": "job",
-      "required": true,
-      "type": "string"
-    },
-    "PK": {
-      "description": "Public Signing Key - Authentiq ID (43 chars)",
-      "in": "path",
-      "name": "PK",
-      "required": true,
-      "type": "string"
-    },
-    "PushToken": {
-      "description": "Push Token.",
-      "in": "body",
-      "name": "body",
-      "required": true,
-      "schema": {
-        "$ref": "#/definitions/PushToken"
-      }
-    },
-    "Scope": {
-      "description": "Claims of scope",
-      "in": "body",
-      "name": "body",
-      "required": true,
-      "schema": {
-        "$ref": "#/definitions/Claims"
-      }
-    }
-  },
-  "responses": {
-    "ErrorResponse": {
-      "description": "Error response",
-      "schema": {
-        "$ref": "#/definitions/Error"
-      }
-    }
-  },
-  "paths": {
-    "/key": {
-      "delete": {
-        "description": "Revoke an Authentiq ID using email & phone.\n\nIf called with `email` and `phone` only, a verification code \nwill be sent by email. Do a second call adding `code` to \ncomplete the revocation.\n",
-        "operationId": "key_revoke_nosecret",
-        "parameters": [
-          {
-            "description": "primary email associated to Key (ID)",
-            "in": "query",
-            "name": "email",
-            "required": true,
-            "type": "string"
-          },
-          {
-            "description": "primary phone number, international representation",
-            "in": "query",
-            "name": "phone",
-            "required": true,
-            "type": "string"
-          },
-          {
-            "description": "verification code sent by email",
-            "in": "query",
-            "name": "code",
-            "required": false,
-            "type": "string"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "200": {
-            "description": "Successfully deleted",
-            "schema": {
-              "properties": {
-                "status": {
-                  "description": "pending or done",
-                  "type": "string"
-                }
-              },
-              "type": "object"
-            }
-          },
-          "401": {
-            "description": "Authentication error `auth-error`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "404": {
-            "description": "Unknown key `unknown-key`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "409": {
-            "description": "Confirm with code sent `confirm-first`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["key", "delete"]
-      },
-      "post": {
-        "consumes": ["application/jwt"],
-        "description": "Register a new ID `JWT(sub, devtoken)`\n\nv5: `JWT(sub, pk, devtoken, ...)`\n\nSee: https://github.com/skion/authentiq/wiki/JWT-Examples\n",
-        "operationId": "key_register",
-        "parameters": [
-          {
-            "$ref": "#/parameters/AuthentiqID"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "201": {
-            "description": "Successfully registered",
-            "schema": {
-              "properties": {
-                "secret": {
-                  "description": "revoke key",
-                  "type": "string"
-                },
-                "status": {
-                  "description": "registered",
-                  "type": "string"
-                }
-              },
-              "type": "object"
-            }
-          },
-          "409": {
-            "description": "Key already registered `duplicate-key`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["key", "post"]
-      }
-    },
-    "/key/{PK}": {
-      "delete": {
-        "description": "Revoke an Identity (Key) with a revocation secret",
-        "operationId": "key_revoke",
-        "parameters": [
-          {
-            "$ref": "#/parameters/PK"
-          },
-          {
-            "description": "revokation secret",
-            "in": "query",
-            "name": "secret",
-            "required": true,
-            "type": "string"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "200": {
-            "description": "Successful response",
-            "schema": {
-              "properties": {
-                "status": {
-                  "description": "done",
-                  "type": "string"
-                }
-              },
-              "type": "object"
-            }
-          },
-          "401": {
-            "description": "Key not found / wrong code `auth-error`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "404": {
-            "description": "Unknown key `unknown-key`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["key", "delete"]
-      },
-      "get": {
-        "description": "Get public details of an Authentiq ID.\n",
-        "parameters": [
-          {
-            "$ref": "#/parameters/PK"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "200": {
-            "description": "Successfully retrieved",
-            "schema": {
-              "properties": {
-                "since": {
-                  "format": "date-time",
-                  "type": "string"
-                },
-                "status": {
-                  "type": "string"
-                },
-                "sub": {
-                  "description": "base64safe encoded public signing key",
-                  "type": "string"
-                }
-              },
-              "title": "JWT",
-              "type": "object"
-            }
-          },
-          "404": {
-            "description": "Unknown key `unknown-key`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "410": {
-            "description": "Key is revoked (gone). `revoked-key`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["key", "get"]
-      },
-      "head": {
-        "description": "HEAD info on Authentiq ID\n",
-        "parameters": [
-          {
-            "$ref": "#/parameters/PK"
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "Key exists"
-          },
-          "404": {
-            "description": "Unknown key `unknown-key`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "410": {
-            "description": "Key is revoked `revoked-key`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["key", "head"]
-      },
-      "post": {
-        "consumes": ["application/jwt"],
-        "description": "update properties of an Authentiq ID.\n(not operational in v4; use PUT for now)\n\nv5: POST issuer-signed email & phone scopes in\na self-signed JWT\n\nSee: https://github.com/skion/authentiq/wiki/JWT-Examples\n",
-        "operationId": "key_update",
-        "parameters": [
-          {
-            "$ref": "#/parameters/PK"
-          },
-          {
-            "$ref": "#/parameters/AuthentiqID"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "200": {
-            "description": "Successfully updated",
-            "schema": {
-              "properties": {
-                "status": {
-                  "description": "confirmed",
-                  "type": "string"
-                }
-              },
-              "type": "object"
-            }
-          },
-          "404": {
-            "description": "Unknown key `unknown-key`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["key", "post"]
-      },
-      "put": {
-        "consumes": ["application/jwt"],
-        "description": "Update Authentiq ID by replacing the object.\n\nv4: `JWT(sub,email,phone)` to bind email/phone hash; \n\nv5: POST issuer-signed email & phone scopes\nand PUT to update registration `JWT(sub, pk, devtoken, ...)`\n\nSee: https://github.com/skion/authentiq/wiki/JWT-Examples\n",
-        "operationId": "key_bind",
-        "parameters": [
-          {
-            "$ref": "#/parameters/PK"
-          },
-          {
-            "$ref": "#/parameters/AuthentiqID"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "200": {
-            "description": "Successfully updated",
-            "schema": {
-              "properties": {
-                "status": {
-                  "description": "confirmed",
-                  "type": "string"
-                }
-              },
-              "type": "object"
-            }
-          },
-          "404": {
-            "description": "Unknown key `unknown-key`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "409": {
-            "description": "Already bound to another key `duplicate-hash`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["key", "put"]
-      }
-    },
-    "/login": {
-      "post": {
-        "consumes": ["application/jwt"],
-        "description": "push sign-in request\nSee: https://github.com/skion/authentiq/wiki/JWT-Examples\n",
-        "operationId": "push_login_request",
-        "parameters": [
-          {
-            "$ref": "#/parameters/PushToken"
-          },
-          {
-            "description": "URI App will connect to",
-            "in": "query",
-            "name": "callback",
-            "required": true,
-            "type": "string"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "200": {
-            "description": "Successful response",
-            "schema": {
-              "properties": {
-                "status": {
-                  "description": "sent",
-                  "type": "string"
-                }
-              },
-              "type": "object"
-            }
-          },
-          "401": {
-            "description": "Unauthorized for this callback audience `aud-error` or JWT should be self-signed `auth-error`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["login", "post"]
-      }
-    },
-    "/scope": {
-      "post": {
-        "consumes": ["application/jwt"],
-        "description": "scope verification request\nSee: https://github.com/skion/authentiq/wiki/JWT-Examples\n",
-        "operationId": "sign_request",
-        "parameters": [
-          {
-            "$ref": "#/parameters/Scope"
-          },
-          {
-            "description": "test only mode, using test issuer",
-            "in": "query",
-            "name": "test",
-            "required": false,
-            "type": "integer"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "201": {
-            "description": "Successful response",
-            "schema": {
-              "properties": {
-                "job": {
-                  "description": "20-character ID",
-                  "type": "string"
-                },
-                "status": {
-                  "description": "waiting",
-                  "type": "string"
-                }
-              },
-              "type": "object"
-            }
-          },
-          "429": {
-            "description": "Too Many Requests on same address / number `rate-limit`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["scope", "post"]
-      }
-    },
-    "/scope/{job}": {
-      "delete": {
-        "description": "delete a verification job",
-        "operationId": "sign_delete",
-        "parameters": [
-          {
-            "$ref": "#/parameters/JobID"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "200": {
-            "description": "Successfully deleted",
-            "schema": {
-              "properties": {
-                "status": {
-                  "description": "done",
-                  "type": "string"
-                }
-              },
-              "type": "object"
-            }
-          },
-          "404": {
-            "description": "Job not found `unknown-job`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["scope", "delete"]
-      },
-      "get": {
-        "description": "get the status / current content of a verification job",
-        "operationId": "sign_retrieve",
-        "parameters": [
-          {
-            "$ref": "#/parameters/JobID"
-          }
-        ],
-        "produces": ["application/json", "application/jwt"],
-        "responses": {
-          "200": {
-            "description": "Successful response (JWT)",
-            "schema": {
-              "properties": {
-                "exp": {
-                  "type": "integer"
-                },
-                "field": {
-                  "type": "string"
-                },
-                "sub": {
-                  "description": "base64safe encoded public signing key",
-                  "type": "string"
-                }
-              },
-              "title": "JWT",
-              "type": "object"
-            }
-          },
-          "204": {
-            "description": "Confirmed, waiting for signing"
-          },
-          "404": {
-            "description": "Job not found `unknown-job`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["scope", "get"]
-      },
-      "head": {
-        "description": "HEAD to get the status of a verification job",
-        "operationId": "sign_retrieve_head",
-        "parameters": [
-          {
-            "$ref": "#/parameters/JobID"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "200": {
-            "description": "Confirmed and signed"
-          },
-          "204": {
-            "description": "Confirmed, waiting for signing"
-          },
-          "404": {
-            "description": "Job not found `unknown-job`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["scope", "head"]
-      },
-      "post": {
-        "consumes": ["application/json"],
-        "description": "this is a scope confirmation",
-        "operationId": "sign_confirm",
-        "parameters": [
-          {
-            "$ref": "#/parameters/JobID"
-          }
-        ],
-        "produces": ["application/json"],
-        "responses": {
-          "202": {
-            "description": "Successfully confirmed",
-            "schema": {
-              "properties": {
-                "status": {
-                  "description": "confirmed",
-                  "type": "string"
-                }
-              },
-              "type": "object"
-            }
-          },
-          "401": {
-            "description": "Confirmation error `auth-error`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "404": {
-            "description": "Job not found `unknown-job`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "405": {
-            "description": "JWT POSTed to scope `not-supported`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["scope", "post"]
-      },
-      "put": {
-        "consumes": ["application/jwt"],
-        "description": "authority updates a JWT with its signature\nSee: https://github.com/skion/authentiq/wiki/JWT-Examples\n",
-        "operationId": "sign_update",
-        "parameters": [
-          {
-            "$ref": "#/parameters/JobID"
-          }
-        ],
-        "produces": ["application/jwt"],
-        "responses": {
-          "200": {
-            "description": "Successfully updated",
-            "schema": {
-              "properties": {
-                "jwt": {
-                  "description": "result is JWT or JSON??",
-                  "type": "string"
-                },
-                "status": {
-                  "description": "ready",
-                  "type": "string"
-                }
-              },
-              "type": "object"
-            }
-          },
-          "404": {
-            "description": "Job not found `unknown-job`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "409": {
-            "description": "Job not confirmed yet `confirm-first`",
-            "schema": {
-              "$ref": "#/definitions/Error"
-            }
-          },
-          "default": {
-            "$ref": "#/responses/ErrorResponse"
-          }
-        },
-        "tags": ["scope", "put"]
-      }
-    }
-  },
-  "definitions": {
-    "AuthentiqID": {
-      "description": "Authentiq ID in JWT format, self-signed.\n",
-      "properties": {
-        "devtoken": {
-          "description": "device token for push messages",
-          "type": "string"
-        },
-        "sub": {
-          "description": "UUID and public signing key",
-          "type": "string"
-        }
-      },
-      "required": ["sub"]
-    },
-    "Claims": {
-      "description": "Claim in JWT format, self- or issuer-signed. \n",
-      "properties": {
-        "email": {
-          "description": "",
-          "type": "string"
-        },
-        "phone": {
-          "description": "",
-          "type": "string"
-        },
-        "scope": {
-          "description": "claim scope",
-          "type": "string"
-        },
-        "sub": {
-          "description": "UUID",
-          "type": "string"
-        },
-        "type": {
-          "description": "",
-          "type": "string"
-        }
-      },
-      "required": ["sub", "scope"]
-    },
-    "Error": {
-      "properties": {
-        "detail": {
-          "type": "string"
-        },
-        "error": {
-          "type": "integer"
-        },
-        "title": {
-          "type": "string"
-        },
-        "type": {
-          "description": "unique uri for this error",
-          "type": "string"
-        }
-      },
-      "required": ["error"]
-    },
-    "PushToken": {
-      "description": "PushToken in JWT format, self-signed. \n",
-      "properties": {
-        "aud": {
-          "description": "audience (URI)",
-          "type": "string"
-        },
-        "exp": {
-          "type": "integer"
-        },
-        "iat": {
-          "type": "integer"
-        },
-        "iss": {
-          "description": "issuer (URI)",
-          "type": "string"
-        },
-        "nbf": {
-          "type": "integer"
-        },
-        "sub": {
-          "description": "UUID and public signing key",
-          "type": "string"
-        }
-      },
-      "required": ["sub", "iss", "aud"]
-    }
-  }
-}
diff --git a/tests/spec/cli/test.js b/tests/spec/cli/test.js
deleted file mode 100644
index 837b19c3..00000000
--- a/tests/spec/cli/test.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const validateGeneratedModule = require("../../helpers/validateGeneratedModule");
-const { resolve } = require("node:path");
-const assertGeneratedModule = require("../../helpers/assertGeneratedModule");
-
-validateGeneratedModule(resolve(__dirname, "./schema.ts"));
-assertGeneratedModule(
-  resolve(__dirname, "./schema.ts"),
-  resolve(__dirname, "./expected.ts"),
-);
diff --git a/tests/spec/const-keyword/basic.test.ts b/tests/spec/const-keyword/basic.test.ts
index 90d839bf..dbd0273c 100644
--- a/tests/spec/const-keyword/basic.test.ts
+++ b/tests/spec/const-keyword/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("const-keyword", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       addReadonly: true,
diff --git a/tests/spec/custom-extensions/basic.test.ts b/tests/spec/custom-extensions/basic.test.ts
index 2c3279f9..caea62b8 100644
--- a/tests/spec/custom-extensions/basic.test.ts
+++ b/tests/spec/custom-extensions/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("custom extensions", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
     });
diff --git a/tests/spec/defaultAsSuccess/basic.test.ts b/tests/spec/defaultAsSuccess/basic.test.ts
index 0369fc0d..01bd78d3 100644
--- a/tests/spec/defaultAsSuccess/basic.test.ts
+++ b/tests/spec/defaultAsSuccess/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--default-as-success", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       defaultResponseAsSuccess: true,
diff --git a/tests/spec/defaultResponse/basic.test.ts b/tests/spec/defaultResponse/basic.test.ts
index a6cd8a56..87d96b6a 100644
--- a/tests/spec/defaultResponse/basic.test.ts
+++ b/tests/spec/defaultResponse/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--default-response", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       defaultResponseType: "unknown",
diff --git a/tests/spec/deprecated/basic.test.ts b/tests/spec/deprecated/basic.test.ts
index f05b2375..e59796ee 100644
--- a/tests/spec/deprecated/basic.test.ts
+++ b/tests/spec/deprecated/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("@deprecated", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       queryParamsWithBrackets: true,
diff --git a/tests/spec/discriminator/basic.test.ts b/tests/spec/discriminator/basic.test.ts
index b2acb7a2..b8698fac 100644
--- a/tests/spec/discriminator/basic.test.ts
+++ b/tests/spec/discriminator/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("discriminator", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       addReadonly: true,
diff --git a/tests/spec/dot-path-params/basic.test.ts b/tests/spec/dot-path-params/basic.test.ts
index ec04f00e..9d1819e3 100644
--- a/tests/spec/dot-path-params/basic.test.ts
+++ b/tests/spec/dot-path-params/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--dot-path-params", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: true,
diff --git a/tests/spec/enumNamesAsValues/basic.test.ts b/tests/spec/enumNamesAsValues/basic.test.ts
index 76a7e323..718dc24f 100644
--- a/tests/spec/enumNamesAsValues/basic.test.ts
+++ b/tests/spec/enumNamesAsValues/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--enum-names-as-values", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       enumNamesAsValues: true,
diff --git a/tests/spec/enums-2.0/basic.test.ts b/tests/spec/enums-2.0/basic.test.ts
index ebe7396e..a38be9c2 100644
--- a/tests/spec/enums-2.0/basic.test.ts
+++ b/tests/spec/enums-2.0/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("enums-2.0", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       extractRequestParams: true,
diff --git a/tests/spec/extractRequestBody/basic.test.ts b/tests/spec/extractRequestBody/basic.test.ts
index 734bd017..c32859c0 100644
--- a/tests/spec/extractRequestBody/basic.test.ts
+++ b/tests/spec/extractRequestBody/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--extract-request-body", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       extractRequestBody: true,
diff --git a/tests/spec/extractRequestParams/basic.test.ts b/tests/spec/extractRequestParams/basic.test.ts
index 130efc36..7391363b 100644
--- a/tests/spec/extractRequestParams/basic.test.ts
+++ b/tests/spec/extractRequestParams/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--extract-request-params", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       extractRequestParams: true,
diff --git a/tests/spec/extractResponseBody/basic.test.ts b/tests/spec/extractResponseBody/basic.test.ts
index 049e4313..0df652ce 100644
--- a/tests/spec/extractResponseBody/basic.test.ts
+++ b/tests/spec/extractResponseBody/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--extract-response-body", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       extractResponseBody: true,
diff --git a/tests/spec/extractResponseError/basic.test.ts b/tests/spec/extractResponseError/basic.test.ts
index 0d6e2355..0ff2cfee 100644
--- a/tests/spec/extractResponseError/basic.test.ts
+++ b/tests/spec/extractResponseError/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--extract-response-body", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       extractResponseError: true,
diff --git a/tests/spec/js/basic.test.ts b/tests/spec/js/basic.test.ts
index b3cd3c71..899bda46 100644
--- a/tests/spec/js/basic.test.ts
+++ b/tests/spec/js/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--js --axios", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       httpClientType: "axios",
diff --git a/tests/spec/jsAxios/basic.test.ts b/tests/spec/jsAxios/basic.test.ts
index 9249436d..0253f844 100644
--- a/tests/spec/jsAxios/basic.test.ts
+++ b/tests/spec/jsAxios/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--js", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       toJS: true,
diff --git a/tests/spec/moduleNameFirstTag/basic.test.ts b/tests/spec/moduleNameFirstTag/basic.test.ts
index 5557663b..5c0f2956 100644
--- a/tests/spec/moduleNameFirstTag/basic.test.ts
+++ b/tests/spec/moduleNameFirstTag/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--module-name-first-tag", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       moduleNameFirstTag: true,
diff --git a/tests/spec/moduleNameIndex/basic.test.ts b/tests/spec/moduleNameIndex/basic.test.ts
index ff6fca74..4e0716c9 100644
--- a/tests/spec/moduleNameIndex/basic.test.ts
+++ b/tests/spec/moduleNameIndex/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--module-name-index", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       moduleNameIndex: 2,
diff --git a/tests/spec/noClient/basic.test.ts b/tests/spec/noClient/basic.test.ts
index f0b2bb52..f3e8f166 100644
--- a/tests/spec/noClient/basic.test.ts
+++ b/tests/spec/noClient/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--no-client", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: false,
diff --git a/tests/spec/nullable-2.0/basic.test.ts b/tests/spec/nullable-2.0/basic.test.ts
index 4c48503c..446de19f 100644
--- a/tests/spec/nullable-2.0/basic.test.ts
+++ b/tests/spec/nullable-2.0/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("nullable-2.0 refs", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       addReadonly: true,
diff --git a/tests/spec/nullable-3.0/basic.test.ts b/tests/spec/nullable-3.0/basic.test.ts
index 72a29798..5a755ded 100644
--- a/tests/spec/nullable-3.0/basic.test.ts
+++ b/tests/spec/nullable-3.0/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("nullable-3.0 refs", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       addReadonly: true,
diff --git a/tests/spec/object-types/basic.test.ts b/tests/spec/object-types/basic.test.ts
index 42554a9b..bfa60a76 100644
--- a/tests/spec/object-types/basic.test.ts
+++ b/tests/spec/object-types/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("object-types", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       addReadonly: true,
diff --git a/tests/spec/on-insert-path-param/basic.test.ts b/tests/spec/on-insert-path-param/basic.test.ts
index c21d6ab7..f2612c4a 100644
--- a/tests/spec/on-insert-path-param/basic.test.ts
+++ b/tests/spec/on-insert-path-param/basic.test.ts
@@ -18,15 +18,13 @@ describe("basic", async () => {
   });
 
   test("on-insert-path-param", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: true,
       hooks: {
-        // @ts-expect-error
         onInsertPathParam: (paramName) => `encodeURIComponent(${paramName})`,
       },
     });
diff --git a/tests/spec/patch/basic.test.ts b/tests/spec/patch/basic.test.ts
index ef7bdf81..49f66697 100644
--- a/tests/spec/patch/basic.test.ts
+++ b/tests/spec/patch/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--patch", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       patch: true,
diff --git a/tests/spec/readonly/basic.test.ts b/tests/spec/readonly/basic.test.ts
index c40e53a1..ee2be8ca 100644
--- a/tests/spec/readonly/basic.test.ts
+++ b/tests/spec/readonly/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("readonly", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       addReadonly: true,
diff --git a/tests/spec/responses/basic.test.ts b/tests/spec/responses/basic.test.ts
index 94072d3a..14fa2cb1 100644
--- a/tests/spec/responses/basic.test.ts
+++ b/tests/spec/responses/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("responses", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateResponses: true,
diff --git a/tests/spec/routeTypes/basic.test.ts b/tests/spec/routeTypes/basic.test.ts
index 8db09064..0226aad5 100644
--- a/tests/spec/routeTypes/basic.test.ts
+++ b/tests/spec/routeTypes/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--route-types", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: false,
diff --git a/tests/spec/singleHttpClient/basic.test.ts b/tests/spec/singleHttpClient/basic.test.ts
index e45e3070..1ea7f76b 100644
--- a/tests/spec/singleHttpClient/basic.test.ts
+++ b/tests/spec/singleHttpClient/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--single-http-client", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       singleHttpClient: true,
diff --git a/tests/spec/sortTypes-false/basic.test.ts b/tests/spec/sortTypes-false/basic.test.ts
index ec1ff172..246aeedd 100644
--- a/tests/spec/sortTypes-false/basic.test.ts
+++ b/tests/spec/sortTypes-false/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--sort-types=false", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: true,
diff --git a/tests/spec/sortTypes/basic.test.ts b/tests/spec/sortTypes/basic.test.ts
index 3c858b04..0de7eedf 100644
--- a/tests/spec/sortTypes/basic.test.ts
+++ b/tests/spec/sortTypes/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--sort-types", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: true,
diff --git a/tests/spec/specProperty/basic.test.ts b/tests/spec/specProperty/basic.test.ts
index 74529555..cdcf98a4 100644
--- a/tests/spec/specProperty/basic.test.ts
+++ b/tests/spec/specProperty/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("specProperty", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: false,
diff --git a/tests/spec/typeSuffixPrefix/basic.test.ts b/tests/spec/typeSuffixPrefix/basic.test.ts
index 7af2c2b2..511bb319 100644
--- a/tests/spec/typeSuffixPrefix/basic.test.ts
+++ b/tests/spec/typeSuffixPrefix/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--type-prefix and --type-suffix", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateClient: true,
diff --git a/tests/spec/unionEnums/basic.test.ts b/tests/spec/unionEnums/basic.test.ts
index 4e3d40dd..986e2e37 100644
--- a/tests/spec/unionEnums/basic.test.ts
+++ b/tests/spec/unionEnums/basic.test.ts
@@ -18,10 +18,9 @@ describe("basic", async () => {
   });
 
   test("--union-enums", async () => {
-    // @ts-expect-error
     await generateApi({
       name: "schema",
-      input: path.resolve(__dirname, "schema.json"),
+      input: path.resolve(import.meta.dirname, "schema.json"),
       output: tmpdir,
       silent: true,
       generateUnionEnums: true,
diff --git a/tests/utils.ts b/tests/utils.ts
index b17957fb..3178ec1a 100644
--- a/tests/utils.ts
+++ b/tests/utils.ts
@@ -3,7 +3,7 @@ import * as path from "node:path";
 
 export async function collectAllSchemas() {
   const schemas = [];
-  const schemaPath = path.join(__dirname, "fixtures", "schemas");
+  const schemaPath = path.join(import.meta.dirname, "fixtures", "schemas");
   const schemaFiles = await fs.readdir(schemaPath, { recursive: true });
   for (const schemaFile of schemaFiles) {
     if (
diff --git a/tsconfig.json b/tsconfig.json
index aebd35a2..e8862870 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,9 +1,9 @@
 {
+  "extends": ["@tsconfig/strictest", "@tsconfig/node18"],
   "compilerOptions": {
-    "allowJs": true,
+    "checkJs": false,
     "noEmit": true,
-    "noEmitOnError": true,
-    "noImplicitAny": true,
-    "strict": true
+    "noPropertyAccessFromIndexSignature": false,
+    "resolveJsonModule": true
   }
 }
diff --git a/vitest.config.mts b/vitest.config.ts
similarity index 100%
rename from vitest.config.mts
rename to vitest.config.ts
diff --git a/yarn.lock b/yarn.lock
index 70fc80b1..c1286a7d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -478,6 +478,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@tsconfig/node18@npm:18.2.4":
+  version: 18.2.4
+  resolution: "@tsconfig/node18@npm:18.2.4"
+  checksum: 10c0/cdfd17f212660374eb2765cd5907b2252e43cfa2623cd52307a49f004327ef49bbe7d53c78b0aca57f33e9a5cb0d7d2eb5ded9be1235e6212f65c9f0699322b6
+  languageName: node
+  linkType: hard
+
+"@tsconfig/strictest@npm:2.0.5":
+  version: 2.0.5
+  resolution: "@tsconfig/strictest@npm:2.0.5"
+  checksum: 10c0/cfc86da2d57f7b4b0827701b132c37a4974284e5c40649656c0e474866dfd8a69f57c6718230d8a8139967e2a95438586b8224c13ab0ff9d3a43eda771c50cc4
+  languageName: node
+  linkType: hard
+
 "@types/didyoumean@npm:1.2.2":
   version: 1.2.2
   resolution: "@types/didyoumean@npm:1.2.2"
@@ -2566,6 +2580,8 @@ __metadata:
   resolution: "swagger-typescript-api@workspace:."
   dependencies:
     "@biomejs/biome": "npm:1.8.2"
+    "@tsconfig/node18": "npm:18.2.4"
+    "@tsconfig/strictest": "npm:2.0.5"
     "@types/didyoumean": "npm:1.2.2"
     "@types/js-yaml": "npm:4.0.9"
     "@types/lodash": "npm:4.17.5"