diff --git a/docker-compose.yml b/docker-compose.yml
index 1bbe19ab..c7e51138 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,7 +1,7 @@
 version: '3'
 services:
   postgres:
-    image: postgres:16
+    image: postgres:13
     restart: always
     ports:
     - "5432:5432"
@@ -15,4 +15,6 @@ services:
 volumes:
   # command to list volumes: docker volume ls
   # command to delete volumes: docker volume rm <volume_name>
+  # but usually you'll need to do docker compose down first.
+  # so `docker compose down && docker volume rm pgkit_postgres` should do the trick.
   postgres: