diff --git a/simple/docker-compose.yml b/simple/docker-compose.yml
index eb0a7df..7e6166d 100644
--- a/simple/docker-compose.yml
+++ b/simple/docker-compose.yml
@@ -1,5 +1,3 @@
-version: '2'
-
 networks:
   v6d:
     external: true