diff --git a/docker-compose.yml b/docker-compose.yml
index 0afe5e43a1072fc83d539ce1610f9c201d26a185..5eaa84e6e7d09783219b207815df20b67c0eff3e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 services:
   ekms01:
     image: ekms
diff --git a/docker-compose_integration_test.yml b/docker-compose_integration_test.yml
index 63c9b5b5c41d7d2fd4bfa577b01d86c998c26524..96eba560f6bbc895fd9dff0501a762f0b319417b 100644
--- a/docker-compose_integration_test.yml
+++ b/docker-compose_integration_test.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 services:
   kms_1:
     image: ekms