diff --git a/DMS/docker-compose.yml b/DMS/docker-compose.yml
index 9965851..98a13e3 100644
--- a/DMS/docker-compose.yml
+++ b/DMS/docker-compose.yml
@@ -93,7 +93,7 @@ services:
       - roundcube-db
       - mailserver
     environment:
-      - LANGUAGE=en_US
+      - ROUNDCUBEMAIL_DEFAULT_LANGUAGE=en_US
       - ROUNDCUBEMAIL_DB_TYPE=pgsql
       - ROUNDCUBEMAIL_DB_HOST=roundcube-db
       - ROUNDCUBEMAIL_DB_NAME=roundcube