diff --git a/package.json b/package.json
index 1bf93ce..94c147c 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "sinon": "~1.12.2",
     "sinon-chai": "~2.6.0",
     "sloc": "~0.1.9",
-    "uglify-js": "~2.4.16"
+    "uglify-js": "~3.6.1"
   },
   "repository": {
     "type": "git",