diff --git a/service/mariadb.yaml b/service/mariadb.yaml
index 177444b..3a34b88 100644
--- a/service/mariadb.yaml
+++ b/service/mariadb.yaml
@@ -1,3 +1,4 @@
+dsl_version: 0.1.0
 service:
   name: {{ service.database }}
   ports: