diff --git a/package.json b/package.json
index f56cfdbe..6ddb0822 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
         "del": "~1.1.1",
         "gulp": "~3.8.8",
         "laravel-elixir": "~0.9.1",
-        "laravel-elixir-jshint": "~0.1.6"
+        "laravel-elixir-jshint": "~0.1.6",
+        "array-union": "~1.0.1"
     }
 }