diff --git a/package.json b/package.json
index 5a0370e..54ca090 100644
--- a/package.json
+++ b/package.json
@@ -30,6 +30,7 @@
   },
   "dependencies": {
     "mkdirp": "^0.5.1",
+    "q": "^1.4.1",
     "rimraf": "^2.5.3"
   },
   "devDependencies": {