diff --git a/package.json b/package.json
index 40459348..41bb9891 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "opener": "~1.3.0",
     "shelljs": "~0.2.6",
     "tape": "~4.0.0",
-    "uglify-js": "~2.2.5"
+    "uglify-js": "~3.6.7"
   },
   "keywords": [
     "ace",