diff --git a/package.json b/package.json
index d3d2053..85cdbd8 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,6 @@
   "devDependencies": {
       "coffee-script": "1.4.0",
       "less": "1.3.1",
-      "uglify-js": "1.3.4"
+      "uglify-js": "3.6.1"
   }
 }