diff --git a/package.json b/package.json
index cad3b6f..7f70125 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "rxjs": "^5.4.0"
   },
   "devDependencies": {
-    "async": "^2.4.0",
+    "async": "^3.0.1",
     "express": "^4.15.2",
     "hystrix-dashboard": "^1.0.0",
     "istanbul": "^0.4.5",