diff --git a/docker-compose.yml b/docker-compose.yml
index 52021252..1767950d 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5415,7 +5415,8 @@ services:
             "database": "zammad_production"
           }'
       WHODB_MARIADB_1: '{
-          "host": "mariadb://mariadb:3306/",
+          "host": "mariadb://mariadb",
+          "port": 3306,
           "user": "root",
           "password": "${MARIADB_ENVIRONMENT_MYSQL_ROOT_PASSWORD}"
         }'