diff --git a/scripts/docs.angularjs.org-firebase/functions/package.json b/scripts/docs.angularjs.org-firebase/functions/package.json
index ca8142d9a65f..59ce3f4a58a1 100644
--- a/scripts/docs.angularjs.org-firebase/functions/package.json
+++ b/scripts/docs.angularjs.org-firebase/functions/package.json
@@ -1,6 +1,9 @@
 {
   "name": "functions",
   "description": "Cloud Functions for Firebase",
+  "engines": {
+    "node": "10"
+  },  
   "scripts": {
     "lint": "eslint .",
     "serve": "firebase serve --only functions",