diff --git a/appengine/pubsub/package.json b/appengine/pubsub/package.json
index e943eafe3d..9b3e9e853c 100644
--- a/appengine/pubsub/package.json
+++ b/appengine/pubsub/package.json
@@ -17,7 +17,7 @@
     "body-parser": "1.18.2",
     "express": "4.16.2",
     "pug": "2.0.1",
-    "safe-buffer": "5.1.1"
+    "safe-buffer": "5.2.1"
   },
   "devDependencies": {
     "@google-cloud/nodejs-repo-tools": "2.2.1",