diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7d77227..2e3e989 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 ## CHANGE LOG
 
+### v3.4.1
+
+增加为上传文件进行预转的选项，参见 [uploadToken 之 asyncOps 说明](http://docs.qiniutek.com/v3/api/io/#uploadToken-asyncOps)
+
+- `Qiniu::RS.generate_upload_token()` 方法新增 `:async_options` 选项用于进行预转操作。
+
 ### v3.4.0
 
 增加文件复制/移动方法，包括批量复制/移动文件
diff --git a/Gemfile.lock b/Gemfile.lock
index f1b4455..22d68ef 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    qiniu-rs (3.4.0)
+    qiniu-rs (3.4.1)
       json (~> 1.7)
       mime-types (~> 1.19)
       rest-client (~> 1.6)
diff --git a/docs/README.md b/docs/README.md
index 7fa8af2..9f4d279 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -125,7 +125,8 @@ title: Ruby SDK 使用指南 | 七牛云存储
                                     :callback_url       => callback_url,
                                     :callback_body_type => callback_body_type,
                                     :customer           => end_user_id,
-                                    :escape             => allow_upload_callback_api
+                                    :escape             => allow_upload_callback_api,
+                                    :async_options      => async_callback_api_commands
 
 **参数**
 
@@ -157,6 +158,9 @@ title: Ruby SDK 使用指南 | 七牛云存储
 
     `foo=bar&w=$(imageInfo.width)&h=$(imageInfo.height)&exif=$(exif)`
 
+:async_options
+: 可选，字符串类型（String），用于设置文件上传成功后，执行指定的预转指令。参见 [uploadToken 之 asyncOps 说明](http://docs.qiniutek.com/v3/api/io/#uploadToken-asyncOps)
+
 **返回值**
 
 返回一个字符串类型（String）的用于上传文件用的临时授权 `upload_token`。
diff --git a/lib/qiniu/rs.rb b/lib/qiniu/rs.rb
index dd744fa..58909b8 100755
--- a/lib/qiniu/rs.rb
+++ b/lib/qiniu/rs.rb
@@ -252,6 +252,7 @@ module Qiniu
         #token_obj.callback_body_type = opts[:callback_body_type]
         #token_obj.customer = opts[:customer]
         #token_obj.escape = opts[:escape]
+        #token_obj.async_options = opts[:async_options]
         token_obj.generate_token
       end
 
diff --git a/lib/qiniu/rs/version.rb b/lib/qiniu/rs/version.rb
index af38870..8bb67c4 100755
--- a/lib/qiniu/rs/version.rb
+++ b/lib/qiniu/rs/version.rb
@@ -5,7 +5,7 @@ module Qiniu
     module Version
       MAJOR = 3
       MINOR = 4
-      PATCH = 0
+      PATCH = 1
       # Returns a version string by joining <tt>MAJOR</tt>, <tt>MINOR</tt>, and <tt>PATCH</tt> with <tt>'.'</tt>
       #
       # Example
diff --git a/lib/qiniu/tokens/upload_token.rb b/lib/qiniu/tokens/upload_token.rb
index 24ea913..67ecebf 100755
--- a/lib/qiniu/tokens/upload_token.rb
+++ b/lib/qiniu/tokens/upload_token.rb
@@ -10,7 +10,7 @@ module Qiniu
 
         include Utils
 
-        attr_accessor :scope, :expires_in, :callback_url, :callback_body_type, :customer, :escape
+        attr_accessor :scope, :expires_in, :callback_url, :callback_body_type, :customer, :escape, :async_options
 
         def initialize(opts = {})
           @scope = opts[:scope]
@@ -19,6 +19,7 @@ module Qiniu
           @callback_body_type = opts[:callback_body_type]
           @customer = opts[:customer]
           @escape = opts[:escape]
+          @async_options = opts[:async_options]
         end
 
         def generate_signature
@@ -27,6 +28,7 @@ module Qiniu
           params[:callbackBodyType] = @callback_body_type if !@callback_body_type.nil? && !@callback_body_type.empty?
           params[:customer] = @customer if !@customer.nil? && !@customer.empty?
           params[:escape] = 1 if @escape == 1 || @escape == true
+          params[:asyncOps] = @async_options if !@async_options.nil? && !@async_options.empty?
           Utils.urlsafe_base64_encode(params.to_json)
         end
 
diff --git a/spec/qiniu/rs/image_spec.rb b/spec/qiniu/rs/image_spec.rb
index 1da498c..860b6c0 100755
--- a/spec/qiniu/rs/image_spec.rb
+++ b/spec/qiniu/rs/image_spec.rb
@@ -20,7 +20,12 @@ module Qiniu
 
         local_file = File.expand_path('../' + @key, __FILE__)
 
-        upopts = {:scope => @bucket, :expires_in => 3600, :customer => "why404@gmail.com"}
+        upopts = {
+            :scope => @bucket,
+            :expires_in => 3600,
+            :customer => "why404@gmail.com",
+            :async_options => "imageView/1/w/120/h/120"
+        }
         uptoken = Qiniu::RS.generate_upload_token(upopts)
         data = Qiniu::RS.upload_file :uptoken => uptoken, :file => local_file, :bucket => @bucket, :key => @key
         puts data.inspect