diff --git a/examples/docker-compose.yml b/examples/docker-compose.yml
index 839b6fb..c9e7922 100644
--- a/examples/docker-compose.yml
+++ b/examples/docker-compose.yml
@@ -1,4 +1,4 @@
-version: '3'
+version: '3.7'
 
 services:
   docker4ssh: