diff --git a/Annotation/Target.php b/Annotation/Target.php
new file mode 100644
index 00000000..fa8a0a4c
--- /dev/null
+++ b/Annotation/Target.php
@@ -0,0 +1,14 @@
+<?php
+
+
+namespace Annotation;
+
+
+/**
+ * Class Target
+ * @package Annotation
+ */
+#[\Attribute(\Attribute::TARGET_CLASS)] class Target
+{
+
+}
diff --git a/HttpServer/Events/OnWorkerStart.php b/HttpServer/Events/OnWorkerStart.php
index c5859c1a..86455487 100644
--- a/HttpServer/Events/OnWorkerStart.php
+++ b/HttpServer/Events/OnWorkerStart.php
@@ -3,7 +3,7 @@ declare(strict_types=1);
 
 namespace HttpServer\Events;
 
-use co;
+use Annotation\Target;
 use Exception;
 use HttpServer\Abstracts\Callback;
 use Snowflake\Abstracts\Config;
@@ -18,6 +18,7 @@ use Swoole\Server;
  * Class OnWorkerStart
  * @package HttpServer\Events
  */
+#[Target]
 class OnWorkerStart extends Callback
 {