diff --git a/docs/docker-compose.yaml b/docs/docker-compose.yaml
index 9914ef29..b90622f2 100644
--- a/docs/docker-compose.yaml
+++ b/docs/docker-compose.yaml
@@ -1,4 +1,3 @@
-version: '3'
 services:
   docs:
     image: borgmatic-docs
diff --git a/tests/end-to-end/docker-compose.yaml b/tests/end-to-end/docker-compose.yaml
index b05b9b94..12db770b 100644
--- a/tests/end-to-end/docker-compose.yaml
+++ b/tests/end-to-end/docker-compose.yaml
@@ -1,4 +1,3 @@
-version: '3'
 services:
   postgresql:
     image: docker.io/postgres:13.1-alpine