diff --git a/websocket-sharp/CompressionMethod.cs b/websocket-sharp/CompressionMethod.cs
index f7054687..6e5aaaa5 100644
--- a/websocket-sharp/CompressionMethod.cs
+++ b/websocket-sharp/CompressionMethod.cs
@@ -4,7 +4,7 @@
  *
  * The MIT License
  *
- * Copyright (c) 2013-2014 sta.blockhead
+ * Copyright (c) 2013-2015 sta.blockhead
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -31,22 +31,21 @@ using System;
 namespace WebSocketSharp
 {
   /// <summary>
-  /// Contains the values of the compression method used to compress the message on the WebSocket
-  /// connection.
+  /// Specifies the compression method used to compress a message on the WebSocket connection.
   /// </summary>
   /// <remarks>
-  /// The values of the compression method are defined in
-  /// <see href="http://tools.ietf.org/html/draft-ietf-hybi-permessage-compression-09">Compression
-  /// Extensions for WebSocket</see>.
+  /// The compression methods are defined in
+  /// <see href="http://tools.ietf.org/html/draft-ietf-hybi-permessage-compression-19">
+  /// Compression Extensions for WebSocket</see>.
   /// </remarks>
   public enum CompressionMethod : byte
   {
     /// <summary>
-    /// Indicates non compression.
+    /// Specifies non compression.
     /// </summary>
     None,
     /// <summary>
-    /// Indicates using DEFLATE.
+    /// Specifies DEFLATE.
     /// </summary>
     Deflate
   }