diff --git a/docs/en/index.md b/docs/en/index.md
index 14d73c7..4950ebd 100644
--- a/docs/en/index.md
+++ b/docs/en/index.md
@@ -230,7 +230,7 @@ class MySecurityAdminExtension extends Extension
 
 ```yml
 SilverStripe\Admin\SecurityAdmin:
-extensions:
+  extensions:
     - App\Extensions\MySecurityAdminExtension
 ```