diff --git a/package.json b/package.json
index 32c3c61c..1712fdc3 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "pretty-bytes-cli": "2.0.0",
     "semver": "5.5.1",
     "sinon": "6.1.5",
-    "uglify-js": "3.4.8",
+    "uglify-js": "3.4.9",
     "webpack": "3.12.0",
     "webpack-cli": "3.1.0"
   },