diff --git a/package.json b/package.json
index 6b6df6812fb0..0f84cb8f6fa9 100644
--- a/package.json
+++ b/package.json
@@ -94,7 +94,7 @@
     "@types/webpack-dev-server": "^3.1.0",
     "@types/webpack-sources": "^0.1.5",
     "@yarnpkg/lockfile": "1.1.0",
-    "ajv": "6.5.3",
+    "ajv": "6.6.2",
     "common-tags": "^1.8.0",
     "conventional-changelog": "^1.1.0",
     "conventional-commits-parser": "^3.0.0",
diff --git a/packages/angular_devkit/build_angular/package.json b/packages/angular_devkit/build_angular/package.json
index eb88d06b103c..fc747a3a4346 100644
--- a/packages/angular_devkit/build_angular/package.json
+++ b/packages/angular_devkit/build_angular/package.json
@@ -11,7 +11,7 @@
     "@angular-devkit/build-webpack": "0.0.0",
     "@angular-devkit/core": "0.0.0",
     "@ngtools/webpack": "0.0.0",
-    "ajv": "6.5.3",
+    "ajv": "6.6.2",
     "autoprefixer": "9.4.3",
     "circular-dependency-plugin": "5.0.2",
     "clean-css": "4.2.1",
diff --git a/packages/angular_devkit/core/package.json b/packages/angular_devkit/core/package.json
index b6ae6091af4f..eb30c9353dd7 100644
--- a/packages/angular_devkit/core/package.json
+++ b/packages/angular_devkit/core/package.json
@@ -8,7 +8,7 @@
     "core"
   ],
   "dependencies": {
-    "ajv": "6.5.3",
+    "ajv": "6.6.2",
     "chokidar": "2.0.4",
     "fast-json-stable-stringify": "2.0.0",
     "rxjs": "6.3.3",
diff --git a/yarn.lock b/yarn.lock
index 3c2b0f645dfd..60330493ae2f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -826,10 +826,10 @@ ajv-keywords@^3.1.0:
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.2.0.tgz#e86b819c602cf8821ad637413698f1dec021847a"
   integrity sha1-6GuBnGAs+IIa1jdBNpjx3sAhhHo=
 
-ajv@6.5.3:
-  version "6.5.3"
-  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.5.3.tgz#71a569d189ecf4f4f321224fecb166f071dd90f9"
-  integrity sha512-LqZ9wY+fx3UMiiPd741yB2pj3hhil+hQc8taf4o2QGRFpWgZ2V5C8HA165DY9sS3fJwsk7uT7ZlFEyC3Ig3lLg==
+ajv@6.6.2:
+  version "6.6.2"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.6.2.tgz#caceccf474bf3fc3ce3b147443711a24063cc30d"
+  integrity sha512-FBHEW6Jf5TB9MGBgUUA9XHkTbjXYfAUjY43ACMfmdMRHniyoMHjHjzD50OK8LGDWQwp4rWEsIq5kEqq7rvIM1g==
   dependencies:
     fast-deep-equal "^2.0.1"
     fast-json-stable-stringify "^2.0.0"