diff --git a/package.json b/package.json
index 7dc4f61..fc352ae 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "grunt-contrib-clean": "0.6.0",
     "grunt-contrib-concat": "0.5.1",
     "grunt-contrib-sass": "0.8.1",
-    "grunt-contrib-uglify": "0.6.0",
+    "grunt-contrib-uglify": "5.2.2",
     "grunt-postcss": "0.2.0"
   }
 }