diff --git a/compose_example.yml b/compose_example.yml
index d9c9b19a29..ecd5ef86c2 100644
--- a/compose_example.yml
+++ b/compose_example.yml
@@ -39,7 +39,7 @@ services:
 
   db:
     restart: always
-    image: postgres:15-alpine
+    image: groonga/pgroonga:4.0.1-alpine-17
     networks:
       - shonk
     env_file: