diff --git a/app.json b/app.json
index 0ee7edb7c04..22e6718326a 100644
--- a/app.json
+++ b/app.json
@@ -32,5 +32,5 @@
   "name": "ionic-docs",
   "scripts": {
   },
-  "stack": "heroku-18"
+  "stack": "heroku-22"
 }