diff --git a/docs/guides/creating-middleware/index.md b/docs/guides/creating-middleware/index.md
index 3936425..0a60697 100644
--- a/docs/guides/creating-middleware/index.md
+++ b/docs/guides/creating-middleware/index.md
@@ -26,7 +26,7 @@ class CustomMiddleware extends AbstractMiddleware
         ObjectWrapper $object,
         PropertyMap $propertyMap,
         JsonMapperInterface $mapper
-    ): void {
+    ): void
     {
         // Custom logic goes here.
     }
@@ -42,4 +42,4 @@ $mapper = JsonMapperBuilder::new()
     ->withTypedPropertiesMiddleware()
     ->withMiddleware(new CustomMiddleware())
     ->build();
-```
\ No newline at end of file
+```