diff --git a/lib/util/ajv.js b/lib/util/ajv.js
index f9e8b985356..e8b496c2844 100644
--- a/lib/util/ajv.js
+++ b/lib/util/ajv.js
@@ -19,7 +19,8 @@ const ajv = new Ajv({
     meta: false,
     validateSchema: false,
     missingRefs: "ignore",
-    verbose: true
+    verbose: true,
+    schemaId: "id"
 });
 
 ajv.addMetaSchema(metaSchema);
diff --git a/package.json b/package.json
index b5382e20047..5b8a65b8953 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
   "homepage": "https://eslint.org",
   "bugs": "https://github.com/eslint/eslint/issues/",
   "dependencies": {
-    "ajv": "^5.3.0",
+    "ajv": "^6.0.1",
     "babel-code-frame": "^6.22.0",
     "chalk": "^2.1.0",
     "concat-stream": "^1.6.0",