diff --git a/kiri-websocket-server/Sender.php b/kiri-websocket-server/Sender.php
index ae7df04a..51866b6d 100644
--- a/kiri-websocket-server/Sender.php
+++ b/kiri-websocket-server/Sender.php
@@ -14,9 +14,9 @@ class Sender implements WebSocketInterface
 
 
 	/**
-	 * @var AliasServer|Server
+	 * @var AliasServer|Server|null
 	 */
-	private AliasServer|Server $server;
+	private AliasServer|Server|null $server = null;
 
 
 
diff --git a/kiri-websocket-server/Server.php b/kiri-websocket-server/Server.php
index 28a0b3cf..1acecd84 100644
--- a/kiri-websocket-server/Server.php
+++ b/kiri-websocket-server/Server.php
@@ -47,9 +47,6 @@ class Server extends AbstractServer
 			return;
 		}
 		$this->callback = $handler->callback[0];
-
-		$this->sender = $this->getContainer()->get(Sender::class);
-		$this->sender->setServer($this->server);
 	}