diff --git a/package.json b/package.json
index 025f29a9e2bb..2ecdffb46d6a 100644
--- a/package.json
+++ b/package.json
@@ -87,7 +87,7 @@
     "temp": "0.8.3",
     "ttf2eot": "2.0.0",
     "ttf2woff": "2.0.1",
-    "uglify-js": "3.2.1",
+    "uglify-js": "3.3.4",
     "uglifyjs-webpack-plugin": "1.1.2",
     "url-loader": "0.6.2",
     "url-polyfill": "1.0.10",