diff --git a/package.json b/package.json
index 4a9c0e7..7096223 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "coa": "~ 0.4.0",
     "q": "~ 0.9.7",
     "esprima": "~1.1.1",
-    "uglify-js": "~2.4.0",
+    "uglify-js": "~3.6.3",
     "estraverse": "~1.5.0"
   },
   "devDependencies": {