diff --git a/appengine/cloudsql/package.json b/appengine/cloudsql/package.json
index 4ec82752e3..0e6832e26f 100644
--- a/appengine/cloudsql/package.json
+++ b/appengine/cloudsql/package.json
@@ -25,7 +25,7 @@
     "e2e-test": "samples test deploy"
   },
   "dependencies": {
-    "async": "2.5.0",
+    "async": "3.2.2",
     "express": "4.15.4",
     "knex": "0.13.0",
     "mysql": "2.14.1",