diff --git a/docs/en/index.md b/docs/en/index.md
index 3b69a91..f068f67 100644
--- a/docs/en/index.md
+++ b/docs/en/index.md
@@ -205,7 +205,7 @@ $Entry
 
 StaffMember.php
 ```php
-public function forTemplate()
+public function forTemplate(): string
 {
     return $this->renderWith(static::class);
 }