diff --git a/package.json b/package.json
index e3f27dd..b6d6390 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "main" : "index.js",
     "devDependencies" :
         {"browserify" : "6.2.x",
-         "uglify-js"  : "2.4.x",
+         "uglify-js"  : "3.6.x",
          "clean-css"  : "2.2.x",
          "through"    : "2.3.x"},
     "repository" :