diff --git a/docker-compose/outline/docker-compose.yml b/docker-compose/outline/docker-compose.yml
index 9be59aa..ae0b576 100644
--- a/docker-compose/outline/docker-compose.yml
+++ b/docker-compose/outline/docker-compose.yml
@@ -1,5 +1,3 @@
-version: "3.8"
-
 services:
   outline:
     image: docker.getoutline.com/outlinewiki/outline:latest