diff --git a/js/package.json b/js/package.json
index 773f99c01..1649da556 100644
--- a/js/package.json
+++ b/js/package.json
@@ -200,6 +200,7 @@
     "scryptsy": "2.0.0",
     "solc": "ngotchac/solc-js",
     "store": "1.3.20",
+    "uglify-js": "2.8.2",
     "useragent.js": "0.5.6",
     "utf8": "2.1.2",
     "valid-url": "1.0.9",