diff --git a/package.json b/package.json
index 1f3dfdf..6d77fb4 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,8 @@
     "should": "^4.4.2",
     "mocha": "~2.0.1",
     "sanitizer": "^0.1.2",
-    "supertest": "^0.15.0"
+    "supertest": "^0.15.0",
+    "node.extend": "^1.1.3"
   },
   "engines": {
     "node": ">= 0.10.0"