diff --git a/docs/content/examples/use-cases/bind-smtp-network-interface.md b/docs/content/examples/use-cases/bind-smtp-network-interface.md
index 91c6d4ab..3a568e15 100644
--- a/docs/content/examples/use-cases/bind-smtp-network-interface.md
+++ b/docs/content/examples/use-cases/bind-smtp-network-interface.md
@@ -61,7 +61,7 @@ to the respective IP-address on the server you want to use.
         Sometimes containers use the first IP address from Docker host for outgoing traffic and verifications of rDNS (PTR) can occur for that IP address. 
         To force container to use specific IP address from host you can use following configuration in compose.yml
         
-        ```title="compose.yml"
+        ```title="compose.yaml"
         networks:
           default:
             driver_opts: