diff --git a/package.json b/package.json
index f0e47ca..2a0a083 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "gulp-sass": "^3.0.0",
     "gulp-size": "^2.1.0",
     "gulp-sourcemaps": "^2.2.1",
-    "gulp-uglify": "^2.0.0",
+    "gulp-uglify": "^3.0.0",
     "gulp-watch": "^4.3.11",
     "minami": "^1.1.1",
     "esdoc": "^0.4.8",