diff --git a/package.json b/package.json
index 025e218..65e1e02 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "grunt-browserify": "^5.0.0",
     "grunt-cli": "^1.2.0",
     "grunt-contrib-concat": "*",
-    "grunt-contrib-uglify": "^1.0.1",
+    "grunt-contrib-uglify": "^2.2.1",
     "grunt-contrib-watch": "^1.0.0",
     "grunt-jsdoc": "^1.1.0",
     "grunt-mocha-phantomjs": "^3.0.0",