diff --git a/README.md b/README.md
index a22623e..56c6fea 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ The end result is a directory structure that has everything you need to hit the
     │       ├── Dockerfile
     │       └── extras
     │           └── .gitkeep
-    ├── common-settings.yml
+    ├── common-settings.yaml
     ├── compose.override.yaml
     ├── compose.yaml
     ├── env
@@ -214,7 +214,7 @@ Make some code changes, for example to the Docker Compose Cookiecutter template.
         │       ├── Dockerfile
         │       └── extras
         │           └── .gitkeep
-        ├── common-settings.yml
+        ├── common-settings.yaml
         ├── compose.override.yaml
         ├── compose.yaml
         ├── env
diff --git a/docker-compose/README.md b/docker-compose/README.md
index 966a539..881f054 100644
--- a/docker-compose/README.md
+++ b/docker-compose/README.md
@@ -92,7 +92,7 @@ Above example of a multi-component (two in this case) `grafana` service will giv
     │       ├── Dockerfile
     │       └── extras
     │           └── .gitkeep
-    ├── common-settings.yml
+    ├── common-settings.yaml
     ├── compose.override.yaml
     ├── compose.yaml
     ├── env
@@ -113,7 +113,7 @@ With an alternative single-component `hashicorpvault` service the result may loo
     │   ├── Dockerfile
     │   └── extras
     │       └── .gitkeep
-    ├── common-settings.yml
+    ├── common-settings.yaml
     ├── compose.override.yaml
     ├── compose.yaml
     ├── env