diff --git a/docker-compose.yml b/docker-compose.yml
index 6e70b12..715b450 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -15,6 +15,7 @@ services:
     environment:
       - POSTGRES_USER=postgres
       - POSTGRES_PASSWORD=postgres
+      - POSTGRES_DB=${DB_NAME:-ksql}
 
   mysql:
     image: mysql