diff --git a/redmine/docker-compose.yml b/redmine/docker-compose.yml
index 0bb5322..3800687 100644
--- a/redmine/docker-compose.yml
+++ b/redmine/docker-compose.yml
@@ -6,7 +6,7 @@ services:
     image: redmine:${REDMINE_VERSION}
     restart: always
     environment:
-      REDMINE_DB_MYSQL: ${REDMINE_DB_MYSQL}
+      REDMINE_DB_MYSQL: db
       REDMINE_DB_PASSWORD: ${REDMINE_DB_PASSWORD}
     volumes:
       - redmine_data:/usr/src/redmine/files