diff --git a/package.json b/package.json
index 824de7f..3012050 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
   ],
   "main": "src/ua-parser.js",
   "scripts": {
-    "build": "uglifyjs src/ua-parser.js > dist/ua-parser.min.js --comments '/UAParser\\.js/' && uglifyjs src/ua-parser.js > dist/ua-parser.pack.js --comments '/UAParser\\.js/' --compress --mangle",
+    "build": "uglifyjs src/ua-parser.js -o dist/ua-parser.min.js --comments '/UAParser\\.js/' && uglifyjs src/ua-parser.js -o dist/ua-parser.pack.js --comments '/UAParser\\.js/' --compress --mangle",
     "test": "jshint src/ua-parser.js && mocha -R nyan test/test.js",
     "verup": "node ./node_modules/verup",
     "version": "node ./node_modules/verup 0"
@@ -99,7 +99,7 @@
     "jshint": "~1.1.0",
     "mocha": "~1.8.0",
     "requirejs": "^2.3.2",
-    "uglify-js": "~1.3.4",
+    "uglify-js": "~2.7.5",
     "verup": "^1.3.x"
   },
   "repository": {