diff --git a/docker-compose.yml b/docker-compose.yml
index cfdfe1a5c..8af635419 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,7 +5,6 @@
 # Don't make changes this file! make a `docker-compose.override.yml` and make your
 # changes there instead.
 
-version: '3'
 services:
   ac-database:
     container_name: ac-database