diff --git a/appengine/typescript/package.json b/appengine/typescript/package.json
index 4ea02cde92..b9745fe5e5 100644
--- a/appengine/typescript/package.json
+++ b/appengine/typescript/package.json
@@ -23,6 +23,7 @@
     "typescript": "^4.0.0"
   },
   "devDependencies": {
+    "@types/node": "^14.14.7",
     "mocha": "^8.0.0",
     "wait-port": "^0.2.7",
     "@types/express": "^4.16.0",