diff --git a/package.json b/package.json
index 322716b45..69519ea4c 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,8 @@
     "wordwrap": "0.0.2",
     "worker-farm": "1.1.0",
     "yargs": "1.3.2",
-    "joi": "~5.1.0"
+    "joi": "~5.1.0",
+    "uglify-js": "~2.4.16"
   },
   "devDependencies": {
     "jest-cli": "0.2.1",