diff --git a/.changeset/sixty-badgers-dance.md b/.changeset/sixty-badgers-dance.md
new file mode 100644
index 000000000..fa636a45f
--- /dev/null
+++ b/.changeset/sixty-badgers-dance.md
@@ -0,0 +1,5 @@
+---
+'preact-cli': patch
+---
+
+Corrects error when `src/sw.js` does not exist and esm is disabled
diff --git a/packages/cli/lib/lib/webpack/webpack-client-config.js b/packages/cli/lib/lib/webpack/webpack-client-config.js
index 0d793b6a7..ae472f653 100644
--- a/packages/cli/lib/lib/webpack/webpack-client-config.js
+++ b/packages/cli/lib/lib/webpack/webpack-client-config.js
@@ -66,7 +66,7 @@ async function clientConfig(env) {
 			  ]
 			: [
 					new InjectManifest({
-						swSrc: join(src, 'sw.js'),
+						swSrc: swPath,
 						include: [
 							/200\.html$/,
 							/\.js$/,
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 1b74850b9..b4bb6b8f2 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -127,7 +127,7 @@
     "stack-trace": "0.0.10",
     "style-loader": "^2.0.0",
     "terser-webpack-plugin": "^4.2.3",
-    "typescript": "^4.2.4",
+    "typescript": "~4.2.4",
     "update-notifier": "^5.1.0",
     "url-loader": "^4.1.1",
     "validate-npm-package-name": "^3.0.0",
diff --git a/yarn.lock b/yarn.lock
index d1130eaf1..084624ebf 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -14431,7 +14431,7 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^4.2.4:
+typescript@~4.2.4:
   version "4.2.4"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.2.4.tgz#8610b59747de028fda898a8aef0e103f156d0961"
   integrity sha512-V+evlYHZnQkaz8TRBuxTA92yZBPotr5H+WhQ7bD3hZUndx5tGOa1fuCgeSjxAzM1RiN5IzvadIXTVefuuwZCRg==