diff --git a/package.json b/package.json
index a694b1e346..f01f5db67b 100644
--- a/package.json
+++ b/package.json
@@ -55,6 +55,7 @@
     ]
   },
   "dependencies": {
+    "async": "^2.1.5",
     "body-parser": "1.15.2",
     "commander": "^2.9.0",
     "cookie-parser": "^1.4.1",