diff --git a/app.json b/app.json
index 1c34d10..f18c48c 100644
--- a/app.json
+++ b/app.json
@@ -268,7 +268,7 @@
     {
       "plan": "heroku-postgresql",
       "options": {
-        "version": "12"
+        "version": "15"
       }
     }
   ],