diff --git a/package.json b/package.json
index 228b2dc..01fcee5 100644
--- a/package.json
+++ b/package.json
@@ -8,6 +8,7 @@
     "gulp-concat": "^2.6.0",
     "gulp-minify": "0.0.14",
     "gulp-sort": "^2.0.0",
+    "q": "^1.4.1",
     "three": "^0.81.2"
   },
   "repository": "https://github.com/ToywheelDev/game-lib.git",