diff --git a/websocket-sharp/Server/HttpServer.cs b/websocket-sharp/Server/HttpServer.cs
index fbfc6954..7db2f6af 100644
--- a/websocket-sharp/Server/HttpServer.cs
+++ b/websocket-sharp/Server/HttpServer.cs
@@ -1624,6 +1624,7 @@ namespace WebSocketSharp.Server
     ///   <paramref name="reason"/> could not be UTF-8-encoded.
     ///   </para>
     /// </exception>
+    [Obsolete ("This method will be removed.")]
     public void Stop (CloseStatusCode code, string reason)
     {
       if (code == CloseStatusCode.MandatoryExtension) {