diff --git a/appengine/errorreporting/package.json b/appengine/errorreporting/package.json
index 84d06864b6..a0abb34658 100644
--- a/appengine/errorreporting/package.json
+++ b/appengine/errorreporting/package.json
@@ -24,7 +24,7 @@
   },
   "dependencies": {
     "@google-cloud/error-reporting": "0.2.1",
-    "express": "4.15.4"
+    "express": "4.21.0"
   },
   "devDependencies": {
     "@google-cloud/nodejs-repo-tools": "1.4.17",