diff --git a/package.json b/package.json
index 7f1c5fc..cc9ed2a 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "grunt-contrib-clean": "^0.6.0",
     "grunt-contrib-concat": "^0.5.0",
     "grunt-contrib-sass": "^0.8.1",
-    "grunt-contrib-uglify": "^0.6.0",
+    "grunt-contrib-uglify": "5.0.1",
     "grunt-postcss": "^0.2.0"
   }
 }