diff --git a/package.json b/package.json
index 925e9e7..a56a8ac 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "mocha": "~1.18.2",
     "istanbul": "~0.2.10",
     "jshint": "~2.5.1",
-    "uglify-js": "~2.4.13",
+    "uglify-js": "~3.6.8",
     "browserify": "~4.1.6"
   }
 }