diff --git a/docker-compose.yml b/docker-compose.yml
index 413c04ff63..65b28f54fe 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
     app:
         build:
diff --git a/docker/docker-compose.celery.yml b/docker/docker-compose.celery.yml
index dedae2d004..b6cc3d09e8 100644
--- a/docker/docker-compose.celery.yml
+++ b/docker/docker-compose.celery.yml
@@ -1,7 +1,3 @@
-version: '2.4'
-# Use version 2.4 for mem_limit setting. Version 3+ uses deploy.resources.limits.memory
-# instead, but that only works for swarm with docker-compose 1.25.1.
-
 services:
   mq:
     image: rabbitmq:3-alpine
diff --git a/docker/docker-compose.extend.yml b/docker/docker-compose.extend.yml
index d055c976f4..0538c0d3e9 100644
--- a/docker/docker-compose.extend.yml
+++ b/docker/docker-compose.extend.yml
@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
     app:
         ports: