diff --git a/coreos-config/compose/01_registry/docker-compose.yml b/coreos-config/compose/01_registry/docker-compose.yaml
similarity index 100%
rename from coreos-config/compose/01_registry/docker-compose.yml
rename to coreos-config/compose/01_registry/docker-compose.yaml
diff --git a/coreos-config/compose/02_gitea/docker-compose.yml b/coreos-config/compose/02_gitea/docker-compose.yaml
similarity index 99%
rename from coreos-config/compose/02_gitea/docker-compose.yml
rename to coreos-config/compose/02_gitea/docker-compose.yaml
index d331201..01b3593 100644
--- a/coreos-config/compose/02_gitea/docker-compose.yml
+++ b/coreos-config/compose/02_gitea/docker-compose.yaml
@@ -103,3 +103,4 @@ volumes:
   gitea_data:
   drone_data:
   pg_data:
+...
diff --git a/coreos-config/compose/02_wireguard/docker-compose.yml b/coreos-config/compose/02_wireguard/docker-compose.yaml
similarity index 99%
rename from coreos-config/compose/02_wireguard/docker-compose.yml
rename to coreos-config/compose/02_wireguard/docker-compose.yaml
index 41900de..666b52f 100644
--- a/coreos-config/compose/02_wireguard/docker-compose.yml
+++ b/coreos-config/compose/02_wireguard/docker-compose.yaml
@@ -24,3 +24,4 @@ services:
       - net.ipv4.conf.all.src_valid_mark=1
       - net.ipv6.conf.all.disable_ipv6=0
     restart: unless-stopped
+...
diff --git a/coreos-config/compose/03_miniflux/docker-compose.yml b/coreos-config/compose/03_miniflux/docker-compose.yaml
similarity index 99%
rename from coreos-config/compose/03_miniflux/docker-compose.yml
rename to coreos-config/compose/03_miniflux/docker-compose.yaml
index 7c710d6..1ae3c53 100644
--- a/coreos-config/compose/03_miniflux/docker-compose.yml
+++ b/coreos-config/compose/03_miniflux/docker-compose.yaml
@@ -1,3 +1,4 @@
+---
 version: '3'
 services:
   miniflux:
@@ -47,3 +48,4 @@ networks:
   gateway:
     external: true
     name: gateway
+...
diff --git a/coreos-config/compose/03_nextcloud/docker-compose.yml b/coreos-config/compose/03_nextcloud/docker-compose.yaml
similarity index 99%
rename from coreos-config/compose/03_nextcloud/docker-compose.yml
rename to coreos-config/compose/03_nextcloud/docker-compose.yaml
index efaa485..7379073 100644
--- a/coreos-config/compose/03_nextcloud/docker-compose.yml
+++ b/coreos-config/compose/03_nextcloud/docker-compose.yaml
@@ -1,3 +1,4 @@
+---
 version: '2'
 
 services:
@@ -60,3 +61,4 @@ networks:
     name: gateway
   backend:
     internal: true
+...
diff --git a/coreos-config/compose/03_search/docker-compose.yml b/coreos-config/compose/03_search/docker-compose.yaml
similarity index 99%
rename from coreos-config/compose/03_search/docker-compose.yml
rename to coreos-config/compose/03_search/docker-compose.yaml
index 50a3306..3190428 100644
--- a/coreos-config/compose/03_search/docker-compose.yml
+++ b/coreos-config/compose/03_search/docker-compose.yaml
@@ -62,3 +62,4 @@ networks:
 
 volumes:
   data:
+...
diff --git a/coreos-config/compose/03_syncthing/docker-compose.yml b/coreos-config/compose/03_syncthing/docker-compose.yaml
similarity index 98%
rename from coreos-config/compose/03_syncthing/docker-compose.yml
rename to coreos-config/compose/03_syncthing/docker-compose.yaml
index 2b590d2..26a4b16 100644
--- a/coreos-config/compose/03_syncthing/docker-compose.yml
+++ b/coreos-config/compose/03_syncthing/docker-compose.yaml
@@ -1,3 +1,4 @@
+---
 version: '3.9'
 
 services:
@@ -22,3 +23,4 @@ services:
 
 volumes:
   syncthing-data:
+...
diff --git a/coreos-config/compose/04_blog/docker-compose.yml b/coreos-config/compose/04_blog/docker-compose.yaml
similarity index 98%
rename from coreos-config/compose/04_blog/docker-compose.yml
rename to coreos-config/compose/04_blog/docker-compose.yaml
index c70769f..0e30ff4 100644
--- a/coreos-config/compose/04_blog/docker-compose.yml
+++ b/coreos-config/compose/04_blog/docker-compose.yaml
@@ -1,3 +1,4 @@
+---
 version: "3.4"
 
 services:
@@ -16,3 +17,4 @@ services:
 networks:
   gateway:
     external: true
+...
diff --git a/coreos-config/compose/05_caddy/docker-compose.yml b/coreos-config/compose/05_caddy/docker-compose.yaml
similarity index 99%
rename from coreos-config/compose/05_caddy/docker-compose.yml
rename to coreos-config/compose/05_caddy/docker-compose.yaml
index f32c95b..29ec55b 100644
--- a/coreos-config/compose/05_caddy/docker-compose.yml
+++ b/coreos-config/compose/05_caddy/docker-compose.yaml
@@ -19,3 +19,4 @@ services:
 networks:
   gateway:
     external: true
+...
diff --git a/coreos-config/compose/05_watchtower/docker-compose.yml b/coreos-config/compose/05_watchtower/docker-compose.yaml
similarity index 100%
rename from coreos-config/compose/05_watchtower/docker-compose.yml
rename to coreos-config/compose/05_watchtower/docker-compose.yaml