diff --git a/ci/docker-compose.yaml b/ci/docker-compose.yaml
index 1a71333..bc7e4bb 100644
--- a/ci/docker-compose.yaml
+++ b/ci/docker-compose.yaml
@@ -1,3 +1,4 @@
+---
 version: '3.7'
 
 services:
diff --git a/git_server/docker-compose.yaml b/git_server/docker-compose.yaml
index 0310e58..5a350de 100644
--- a/git_server/docker-compose.yaml
+++ b/git_server/docker-compose.yaml
@@ -1,3 +1,4 @@
+---
 version: '3.7'
 
 services:
@@ -45,4 +46,3 @@ networks:
   proxy:
     external: true
   internal:
-
diff --git a/mail/docker-compose.yml b/mail/docker-compose.yml
index 9927030..071ccc1 100644
--- a/mail/docker-compose.yml
+++ b/mail/docker-compose.yml
@@ -1,3 +1,4 @@
+---
 version: '3.7'
 services:
   mail:
diff --git a/reverse_proxy/docker-compose.yaml b/reverse_proxy/docker-compose.yaml
index fe994ea..d4f1e1a 100644
--- a/reverse_proxy/docker-compose.yaml
+++ b/reverse_proxy/docker-compose.yaml
@@ -1,3 +1,4 @@
+---
 version: '3.7'
 services:
   nginx:
diff --git a/terraria/docker-compose.yaml b/terraria/docker-compose.yaml
index 2897b5e..06a9611 100644
--- a/terraria/docker-compose.yaml
+++ b/terraria/docker-compose.yaml
@@ -1,3 +1,4 @@
+---
 version: '3.7'
 
 services: