diff --git a/package.json b/package.json
index 7617fb8c..6562032f 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "schema-utils": "^1.0.0",
     "serialize-javascript": "^1.4.0",
     "source-map": "^0.6.1",
-    "uglify-js": "^3.4.9",
+    "uglify-js": "^3.1.4",
     "webpack-sources": "^1.1.0",
     "worker-farm": "^1.5.2"
   },