diff --git a/package.json b/package.json
index 8ade349..5bf4203 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "grunt-contrib-copy": "^0.7.0",
     "grunt-contrib-jshint": "^0.10.0",
     "grunt-contrib-qunit": "^0.5.2",
-    "grunt-contrib-uglify": "^0.6.0",
+    "grunt-contrib-uglify": "^4.0.1",
     "grunt-coveralls": "^1.0.0",
     "grunt-karma-coveralls": "^2.5.3",
     "grunt-replace": "^0.8.0",