diff --git a/package.json b/package.json
index b07e0d5..ecbda6a 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,6 @@
   },
   "homepage": "https://typeis.github.io",
   "devDependencies": {
-    "uglify-js": "^2.7.3"
+    "uglify-js": "^3.14.1"
   }
 }