diff --git a/package.json b/package.json
index 108c30d26..0b9634826 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
     "gulp-markdown-github-style": "^1.1.1",
     "gulp-plumber": "^1.2.1",
     "gulp-rename": "^2.0.0",
-    "gulp-terser": "^2.1.0"
+    "gulp-terser": "^2.1.0",
+    "gulp-using": "^0.1.1"
   }
 }