diff --git a/package.json b/package.json
index 7046760..7bdb9d7 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,8 @@
     "through2": "~0.4.0"
   },
   "devDependencies": {
-    "mocha": "~1.17.0"
+    "mocha": "~1.17.0",
+    "gulp-util": "~2.2.13"
   },
   "scripts": {
     "test": "mocha"