diff --git a/stacks/hello-world/docker-compose.yml b/stacks/hello-world/docker-compose.yml
index 930386e..234be90 100644
--- a/stacks/hello-world/docker-compose.yml
+++ b/stacks/hello-world/docker-compose.yml
@@ -1,3 +1,4 @@
+version: "3.3"
 services:
   web-test:
     image: nginxdemos/hello:plain-text