diff --git a/package-lock.json b/package-lock.json
index 2164b42..7d6ee49 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -227,12 +227,21 @@
       "dev": true
     },
     "ajv": {
-      "version": "4.11.8",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-4.11.8.tgz",
-      "integrity": "sha1-gv+wKynmYq5TvcIK8VlHcGc5xTY=",
-      "requires": {
-        "co": "^4.6.0",
-        "json-stable-stringify": "^1.0.1"
+      "version": "6.12.3",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.3.tgz",
+      "integrity": "sha512-4K0cK3L1hsqk9xIb2z9vs/XU+PGJZ9PNpJRDS9YLzmNdX6jmVPfamLvTJr0aDAusnHyCHO6MjzlkAsgtqp9teA==",
+      "requires": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      },
+      "dependencies": {
+        "fast-deep-equal": {
+          "version": "3.1.3",
+          "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
+          "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q=="
+        }
       }
     },
     "ansi-escapes": {
@@ -500,6 +509,15 @@
         "zone-file": "^1.0.0"
       },
       "dependencies": {
+        "ajv": {
+          "version": "4.11.8",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-4.11.8.tgz",
+          "integrity": "sha1-gv+wKynmYq5TvcIK8VlHcGc5xTY=",
+          "requires": {
+            "co": "^4.6.0",
+            "json-stable-stringify": "^1.0.1"
+          }
+        },
         "jsontokens": {
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/jsontokens/-/jsontokens-1.0.0.tgz",
diff --git a/package.json b/package.json
index 27ded04..776af73 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
     "@types/node": "^11.13.8",
     "@types/node-fetch": "^2.5.0",
     "@types/ripemd160": "^2.0.0",
-    "ajv": "^4.11.5",
+    "ajv": "^6.12.3",
     "bip32": "^2.0.4",
     "bip39": "^3.0.2",
     "bitcoinjs-lib": "^5.1.2",