diff --git a/websocket-sharp/Server/WebSocketServiceManager.cs b/websocket-sharp/Server/WebSocketServiceManager.cs
index 6bd71861..4b6018d0 100644
--- a/websocket-sharp/Server/WebSocketServiceManager.cs
+++ b/websocket-sharp/Server/WebSocketServiceManager.cs
@@ -554,35 +554,6 @@ namespace WebSocketSharp.Server
       }
     }
 
-    /// <summary>
-    /// Sends <paramref name="data"/> to every client in the WebSocket services.
-    /// </summary>
-    /// <param name="data">
-    /// An array of <see cref="byte"/> that represents the binary data to send.
-    /// </param>
-    /// <exception cref="InvalidOperationException">
-    /// The current state of the manager is not Start.
-    /// </exception>
-    /// <exception cref="ArgumentNullException">
-    /// <paramref name="data"/> is <see langword="null"/>.
-    /// </exception>
-    [Obsolete ("This method will be removed.")]
-    public void Broadcast (byte[] data)
-    {
-      if (_state != ServerState.Start) {
-        var msg = "The current state of the manager is not Start.";
-        throw new InvalidOperationException (msg);
-      }
-
-      if (data == null)
-        throw new ArgumentNullException ("data");
-
-      if (data.LongLength <= WebSocket.FragmentLength)
-        broadcast (Opcode.Binary, data, null);
-      else
-        broadcast (Opcode.Binary, new MemoryStream (data), null);
-    }
-
     /// <summary>
     /// Sends <paramref name="data"/> to every client in the WebSocket services.
     /// </summary>