diff --git a/package.json b/package.json
index 7bb135c5..0260e746 100644
--- a/package.json
+++ b/package.json
@@ -7,10 +7,6 @@
   },
   "devDependencies": {
     "chai": "^3.3.0",
-    "grunt": "^0.4.4",
-    "grunt-cli": "^1.2.0",
-    "grunt-contrib-concat": "^0.5.1",
-    "grunt-contrib-copy": "^0.5.0",
     "happen": "~0.1.3",
     "mocha": "^2.3.3",
     "mocha-phantomjs": "^4.0.1",