diff --git a/CHANGELOG.md b/CHANGELOG.md
index f738dcc..63a45d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## CHANGE LOG
 
+### v6.3.1
+
+- 为过期方法添加说明。 [https://github.com/qiniu/ruby-sdk/pull/98](https://github.com/qiniu/ruby-sdk/pull/98)
+
 ### v6.3.0
 
 - 添加 authorize_download_url_2 方法，对包含中文或其它 utf-8 字符的 Key 做下载授权。 [https://github.com/qiniu/ruby-sdk/pull/95](https://github.com/qiniu/ruby-sdk/pull/95)
diff --git a/Gemfile.lock b/Gemfile.lock
index 069dbbc..e0df932 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    qiniu (6.3.0)
+    qiniu (6.3.1)
       json (~> 1.7)
       mime-types (~> 1.19)
       rest-client (~> 1.6)
diff --git a/README.md b/README.md
index ffa495b..a3362c7 100755
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@
 
 在您 Ruby 应用程序的 `Gemfile` 文件中，添加如下一行代码：
 
-    gem 'qiniu', '~> 6.3.0'
+    gem 'qiniu', '~> 6.3.1'
 
 然后，在应用程序所在的目录下，可以运行 `bundle` 安装依赖包：
 
diff --git a/lib/qiniu/tokens/access_token.rb b/lib/qiniu/tokens/access_token.rb
index 43534e0..7c09f5b 100755
--- a/lib/qiniu/tokens/access_token.rb
+++ b/lib/qiniu/tokens/access_token.rb
@@ -4,6 +4,8 @@ require 'hmac-sha1'
 require 'qiniu/config'
 require 'qiniu/utils'
 
+### AccessToken 类已经过时，请改用 Qiniu::Auth.generate_acctoken 方法 ###
+
 module Qiniu
       class AccessToken
 
diff --git a/lib/qiniu/tokens/download_token.rb b/lib/qiniu/tokens/download_token.rb
index ccf75a5..ab76b18 100755
--- a/lib/qiniu/tokens/download_token.rb
+++ b/lib/qiniu/tokens/download_token.rb
@@ -4,6 +4,9 @@ require 'json'
 require 'qiniu/tokens/access_token'
 require 'qiniu/utils'
 
+### DownloadToken 类已经过时，请改用 Qiniu::Auth.authorize_download_url 方法 ###
+### 或 Qiniu::Auth.authorize_download_url_2 方法                             ###
+
 module Qiniu
       class DownloadToken < AccessToken
 
diff --git a/lib/qiniu/tokens/upload_token.rb b/lib/qiniu/tokens/upload_token.rb
index c5202f8..61883b8 100755
--- a/lib/qiniu/tokens/upload_token.rb
+++ b/lib/qiniu/tokens/upload_token.rb
@@ -4,6 +4,8 @@ require 'json'
 require 'qiniu/tokens/access_token'
 require 'qiniu/utils'
 
+### UploadToken 类已经过时，请改用 Qiniu::Auth.generate_uptoken 方法 ###
+
 module Qiniu
       class UploadToken < AccessToken
 
diff --git a/lib/qiniu/version.rb b/lib/qiniu/version.rb
index 2d26240..885fc85 100755
--- a/lib/qiniu/version.rb
+++ b/lib/qiniu/version.rb
@@ -4,7 +4,7 @@ module Qiniu
     module Version
       MAJOR = 6
       MINOR = 3
-      PATCH = 0
+      PATCH = 1
       # Returns a version string by joining <tt>MAJOR</tt>, <tt>MINOR</tt>, and <tt>PATCH</tt> with <tt>'.'</tt>
       #
       # Example