diff --git a/mariadb/docker-compose.yml b/mariadb/docker-compose.yml
index 34460d4..c66dccc 100644
--- a/mariadb/docker-compose.yml
+++ b/mariadb/docker-compose.yml
@@ -3,6 +3,8 @@ services:
   db:
     image: mariadb
     restart: unless-stopped
+    environment:
+      MARIADB_ROOT_PASSWORD: ${MARIADB_ROOT_PASSWORD}
 
   adminer:
     image: adminer