diff --git a/docs/portainer-stacks/Swag/adding-theme-park.md b/docs/portainer-stacks/Swag/adding-theme-park.md
index 0a21aa2..980af95 100644
--- a/docs/portainer-stacks/Swag/adding-theme-park.md
+++ b/docs/portainer-stacks/Swag/adding-theme-park.md
@@ -14,7 +14,7 @@ Inside `/config/nginx` folder create file named `theme-park.conf` with:
 
 Now on the subdomain or subfolder file inside location add:
 
-```yml
+```yaml
         # Theme-Park
         set $app guacamole;
         set $theme organizr;