diff --git a/package.json b/package.json
index 609622b..197f7d9 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
   "devDependencies": {
     "grunt": "~0.4.2",
     "grunt-contrib-jshint": "~0.1.1",
-    "grunt-contrib-uglify": "~0.1.2",
+    "grunt-contrib-uglify": "~5.0.0",
     "grunt-contrib-watch": "~0.3.1",
     "grunt-contrib-concat": "~0.1.3",
     "grunt-remove-logging": "~0.1.0",