diff --git a/websocket-sharp/Server/HttpServer.cs b/websocket-sharp/Server/HttpServer.cs
index bff346be..f62c1e5b 100644
--- a/websocket-sharp/Server/HttpServer.cs
+++ b/websocket-sharp/Server/HttpServer.cs
@@ -462,9 +462,9 @@ namespace WebSocketSharp.Server
         return;
       }
 
+      _serviceHosts.Stop (data);
       _listener.Close ();
       _receiveRequestThread.Join (5 * 1000);
-      _serviceHosts.Stop (code, reason);
       _listening = false;
     }
 
@@ -579,9 +579,9 @@ namespace WebSocketSharp.Server
       if (!_listening)
         return;
 
+      _serviceHosts.Stop ();
       _listener.Close ();
       _receiveRequestThread.Join (5 * 1000);
-      _serviceHosts.Stop ();
       _listening = false;
     }
 
diff --git a/websocket-sharp/Server/IWebSocketServiceHost.cs b/websocket-sharp/Server/IWebSocketServiceHost.cs
index ad98dc00..85b8a206 100644
--- a/websocket-sharp/Server/IWebSocketServiceHost.cs
+++ b/websocket-sharp/Server/IWebSocketServiceHost.cs
@@ -201,14 +201,11 @@ namespace WebSocketSharp.Server
     void Stop ();
 
     /// <summary>
-    /// Stops the WebSocket service host with the specified <see cref="ushort"/> and <see cref="string"/>.
+    /// Stops the WebSocket service host with the specified array of <see cref="byte"/>.
     /// </summary>
-    /// <param name="code">
-    /// A <see cref="ushort"/> that contains a status code indicating the reason for stop.
-    /// </param>
-    /// <param name="reason">
-    /// A <see cref="string"/> that contains the reason for stop.
+    /// <param name="data">
+    /// An array of <see cref="byte"/> that contains the reason for stop.
     /// </param>
-    void Stop (ushort code, string reason);
+    void Stop (byte [] data);
   }
 }
diff --git a/websocket-sharp/Server/WebSocketServer.cs b/websocket-sharp/Server/WebSocketServer.cs
index 2917ab04..0ea0cf94 100644
--- a/websocket-sharp/Server/WebSocketServer.cs
+++ b/websocket-sharp/Server/WebSocketServer.cs
@@ -207,7 +207,7 @@ namespace WebSocketSharp.Server
       }
 
       base.Stop ();
-      _serviceHosts.Stop (code, reason);
+      _serviceHosts.Stop (data);
     }
 
     #endregion
diff --git a/websocket-sharp/Server/WebSocketService.cs b/websocket-sharp/Server/WebSocketService.cs
index a380bf2a..3b0ea584 100644
--- a/websocket-sharp/Server/WebSocketService.cs
+++ b/websocket-sharp/Server/WebSocketService.cs
@@ -211,6 +211,11 @@ namespace WebSocketSharp.Server
       _websocket.SendAsync (data, completed);
     }
 
+    internal void Stop (byte [] data)
+    {
+      _websocket.Close (data);
+    }
+
     #endregion
 
     #region Protected Methods
diff --git a/websocket-sharp/Server/WebSocketServiceHost.cs b/websocket-sharp/Server/WebSocketServiceHost.cs
index 818874c2..b4472494 100644
--- a/websocket-sharp/Server/WebSocketServiceHost.cs
+++ b/websocket-sharp/Server/WebSocketServiceHost.cs
@@ -280,7 +280,7 @@ namespace WebSocketSharp.Server
       }
 
       base.Stop ();
-      _sessions.Stop (code, reason);
+      _sessions.Stop (data);
     }
 
     #endregion
@@ -765,19 +765,15 @@ namespace WebSocketSharp.Server
     }
 
     /// <summary>
-    /// Stops receiving the WebSocket connection requests with the specified <see cref="ushort"/> and
-    /// <see cref="string"/>.
+    /// Stops the WebSocket service host with the specified array of <see cref="byte"/>.
     /// </summary>
-    /// <param name="code">
-    /// A <see cref="ushort"/> that contains a status code indicating the reason for stop.
-    /// </param>
-    /// <param name="reason">
-    /// A <see cref="string"/> that contains the reason for stop.
+    /// <param name="data">
+    /// An array of <see cref="byte"/> that contains the reason for stop.
     /// </param>
-    void IWebSocketServiceHost.Stop (ushort code, string reason)
+    void IWebSocketServiceHost.Stop (byte [] data)
     {
       base.Stop ();
-      _sessions.Stop (code, reason);
+      _sessions.Stop (data);
     }
 
     #endregion
diff --git a/websocket-sharp/Server/WebSocketServiceHostManager.cs b/websocket-sharp/Server/WebSocketServiceHostManager.cs
index 2bc238ff..4a622bb5 100644
--- a/websocket-sharp/Server/WebSocketServiceHostManager.cs
+++ b/websocket-sharp/Server/WebSocketServiceHostManager.cs
@@ -193,7 +193,7 @@ namespace WebSocketSharp.Server
         _serviceHosts.Remove (servicePath);
       }
 
-      host.Stop ((ushort) CloseStatusCode.AWAY, String.Empty);
+      host.Stop (((ushort) CloseStatusCode.AWAY).ToByteArray (ByteOrder.BIG));
       return true;
     }
 
@@ -208,12 +208,12 @@ namespace WebSocketSharp.Server
       }
     }
 
-    internal void Stop (ushort code, string reason)
+    internal void Stop (byte [] data)
     {
       lock (_sync)
       {
         foreach (var host in _serviceHosts.Values)
-          host.Stop (code, reason);
+          host.Stop (data);
 
         _serviceHosts.Clear ();
       }
diff --git a/websocket-sharp/Server/WebSocketServiceManager.cs b/websocket-sharp/Server/WebSocketServiceManager.cs
index cddd2932..4e17fe96 100644
--- a/websocket-sharp/Server/WebSocketServiceManager.cs
+++ b/websocket-sharp/Server/WebSocketServiceManager.cs
@@ -508,7 +508,7 @@ namespace WebSocketSharp.Server
       }
     }
 
-    internal void Stop (ushort code, string reason)
+    internal void Stop (byte [] data)
     {
       stopSweepTimer ();
       lock (_sync)
@@ -518,7 +518,7 @@ namespace WebSocketSharp.Server
 
         _stopped = true;
         foreach (var service in copy ().Values)
-          service.Stop (code, reason);
+          service.Stop (data);
       }
     }
 
@@ -588,7 +588,7 @@ namespace WebSocketSharp.Server
             {
               var state = service.WebSocket.ReadyState;
               if (state == WebSocketState.OPEN)
-                service.Stop (CloseStatusCode.ABNORMAL, String.Empty);
+                service.Stop (((ushort) CloseStatusCode.ABNORMAL).ToByteArray (ByteOrder.BIG));
               else if (state == WebSocketState.CLOSING)
                 continue;
               else
diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index 3bc4ce6c..e4b843f0 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -586,9 +586,9 @@ namespace WebSocketSharp
     private void close (ushort code, string reason)
     {
       var data = code.Append (reason);
-      if (data.Length > 125)
+      var msg = data.CheckIfValidCloseData ();
+      if (msg != null)
       {
-        var msg = "The payload length of a Close frame must be 125 bytes or less.";
         _logger.Error (String.Format ("{0}\ncode: {1}\nreason: {2}", msg, code, reason));
         error (msg);
 
@@ -1314,6 +1314,12 @@ namespace WebSocketSharp
 
     #region Internal Methods
 
+    // As server
+    internal void Close (byte [] data)
+    {
+      close (new PayloadData (data));
+    }
+
     // As server
     internal void Close (HttpStatusCode code)
     {
@@ -1346,7 +1352,7 @@ namespace WebSocketSharp
     /// </param>
     public void Close (ushort code)
     {
-      Close (code, String.Empty);
+      Close (code, "");
     }
 
     /// <summary>
@@ -1358,7 +1364,7 @@ namespace WebSocketSharp
     /// </param>
     public void Close (CloseStatusCode code)
     {
-      close ((ushort) code, String.Empty);
+      close (new PayloadData (((ushort) code).ToByteArray (ByteOrder.BIG)));
     }
 
     /// <summary>
@@ -1377,9 +1383,9 @@ namespace WebSocketSharp
     /// </param>
     public void Close (ushort code, string reason)
     {
-      if (!code.IsCloseStatusCode ())
+      var msg = code.CheckIfValidCloseStatusCode ();
+      if (msg != null)
       {
-        var msg = "Invalid close status code.";
         _logger.Error (String.Format ("{0}\ncode: {1}", msg, code));
         error (msg);