diff --git a/websocket-sharp/CompressionMethod.cs b/websocket-sharp/CompressionMethod.cs
index 6e5aaaa5..326e06db 100644
--- a/websocket-sharp/CompressionMethod.cs
+++ b/websocket-sharp/CompressionMethod.cs
@@ -31,11 +31,12 @@ using System;
 namespace WebSocketSharp
 {
   /// <summary>
-  /// Specifies the compression method used to compress a message on the WebSocket connection.
+  /// Specifies the compression method used to compress a message on
+  /// the WebSocket connection.
   /// </summary>
   /// <remarks>
-  /// The compression methods are defined in
-  /// <see href="http://tools.ietf.org/html/draft-ietf-hybi-permessage-compression-19">
+  /// The compression methods that can be used are defined in
+  /// <see href="https://tools.ietf.org/html/rfc7692">
   /// Compression Extensions for WebSocket</see>.
   /// </remarks>
   public enum CompressionMethod : byte