diff --git a/README.md b/README.md
index 0534f1a9..ae13b390 100644
--- a/README.md
+++ b/README.md
@@ -539,6 +539,11 @@ client.Open(new Uri("ws://localhost:3000/"));
     <summary><sub><strong>Websocket Server</strong></sub></summary>
 
 ```csharp
+using System;
+using Netly;
+
+var server = new HttpServer();
+
 server.OnOpen(() =>
 {
     //  server started.
@@ -605,4 +610,4 @@ server.Open(new Uri("http://localhost:8080"));
 </details>
 
 </ul>
-<br>
\ No newline at end of file
+<br>