diff --git a/package.json b/package.json
index 8c2d546..b57cc35 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
   },
   "dependencies": {},
   "devDependencies": {
+    "ajv": "^6.6.2",
     "addons-linter": "^1.3.2",
     "chai": "^4.1.2",
     "eslint": "^3.17.1",