diff --git a/docker-compose.yml b/docker-compose.yml
index 97f2443..13eaac5 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -37,6 +37,7 @@ services:
       - /var/lib/docker/volumes/nextcloud/db:/var/lib/mysql:rw
       - /var/lib/docker/volumes/nextcloud/db:/etc/mysql/conf.d:rw
     environment:
+      - DB_HOST=mariadb
       - MYSQL_ROOT_PASSWORD=C@ptn&mo
       - MYSQL_PASSWORD=C@ptn&mo
       - MYSQL_DATABASE=nextcloud