diff --git a/appengine/cloudsql/package.json b/appengine/cloudsql/package.json
index f37f65a1a4..07d0f98073 100644
--- a/appengine/cloudsql/package.json
+++ b/appengine/cloudsql/package.json
@@ -23,7 +23,7 @@
     "test": "repo-tools test run --cmd npm -- run all-test"
   },
   "dependencies": {
-    "async": "2.6.0",
+    "async": "2.6.3",
     "express": "4.16.3",
     "knex": "0.14.4",
     "mysql": "2.15.0",