diff --git a/stack-compose.yml b/stack-compose.yml
index 2230b57..7c15e21 100644
--- a/stack-compose.yml
+++ b/stack-compose.yml
@@ -1,3 +1,6 @@
+version: "3.4"
+
+services:
   frontend:
     image: registry.gitlab.com/sahkoinsinoorikilta/vtmk/web2.0-frontend:prod
     deploy: