diff --git a/docker-compose.yml b/docker-compose.yml
index b35ea07..fc6e337 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -17,7 +17,7 @@ services:
       context: ./backend
       dockerfile: Dockerfile
     environment:
-      - DB_HOST=db
+      - DB_HOST=${DB_HOST:-db}
       - DB_USER=${DB_USER:-omni_user}
       - DB_PORT=${DB_PORT:-3306}
       - DB_PASSWORD=${DB_PASSWORD:-omni_pass}