diff --git a/.devcontainer/docker-compose.yml b/.devcontainer/docker-compose.yml
index 5d9917b399..85f9eb22cc 100644
--- a/.devcontainer/docker-compose.yml
+++ b/.devcontainer/docker-compose.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 services:
   app:
     working_dir: /workspaces/mastodon/