diff --git a/package.json b/package.json
index a4707d6..ad62c0d 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "grunt": "~0.4.0"
   },
   "dependencies": {
-    "uglify-js": "2.4.1",
+    "uglify-js": "3.7.2",
     "datauri": "~0.2.0",
     "clean-css": "1.1.7"
   },