diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ec1123d..2bd815fa 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 #Changelog
 
+## 7.4.0 (2020-06-09)
+## 增加
+新增Dns预解析功能，上传请求大概率跳过Dns解析步骤，提高上传质量。
+
 ## 7.3.5 (2020-05-29)
 ## 增加
 日志上报errorType新增prototol_error协议错误
diff --git a/Qiniu.podspec b/Qiniu.podspec
index ed17e115..fd134952 100755
--- a/Qiniu.podspec
+++ b/Qiniu.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'Qiniu'
-  s.version      = '7.3.5'
+  s.version      = '7.4.0'
   s.summary      = 'Qiniu Resource Storage SDK for iOS and Mac'
   s.homepage     = 'https://github.com/qiniu/objc-sdk'
   s.social_media_url = 'http://weibo.com/qiniutek'
@@ -16,7 +16,7 @@ Pod::Spec.new do |s|
   s.license = { :type => "MIT", :text => <<-LICENSE
 The MIT License (MIT)
 
-Copyright (c) 2011-2017 qiniu.com
+Copyright (c) 2011-2020 qiniu.com
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/QiniuSDK/Utils/QNVersion.h b/QiniuSDK/Utils/QNVersion.h
index 4fa9faa5..4fc24f64 100755
--- a/QiniuSDK/Utils/QNVersion.h
+++ b/QiniuSDK/Utils/QNVersion.h
@@ -11,4 +11,4 @@
 /**
  *    sdk 版本
  */
-static NSString *const kQiniuVersion = @"7.3.5";
+static NSString *const kQiniuVersion = @"7.4.0";
diff --git a/QiniuSDKTests/QNComplexUploadSceneTest.m b/QiniuSDKTests/QNComplexUploadSceneTest.m
index a696db1c..bf23f8b9 100644
--- a/QiniuSDKTests/QNComplexUploadSceneTest.m
+++ b/QiniuSDKTests/QNComplexUploadSceneTest.m
@@ -33,7 +33,7 @@ - (void)testMutiUpload{
     __block int completeCount = 0;
     __block int successCount = 0;
     for (int i=0; i<maxCount; i++) {
-        [self template:(i + 1) * 1024 complete:^(BOOL isSuccess){
+        [self template:(i + 1) * 100 complete:^(BOOL isSuccess){
             @synchronized (self) {
                 if (isSuccess) {
                     successCount += 1;
diff --git a/README.md b/README.md
index 8d062591..ff7b299a 100755
--- a/README.md
+++ b/README.md
@@ -20,6 +20,7 @@ pod "Qiniu", "~> 7.3"
 
 |               Qiniu SDK 版本               | 最低 iOS版本 | 最低 OS X 版本 |     Notes     |
 | :--------------------------------------: | :------: | :--------: | :-----------: |
+|                  7.4.x                   |  iOS 7   | OS X 10.9  | Xcode 最低版本 6. |
 |                  7.3.x                   |  iOS 7   | OS X 10.9  | Xcode 最低版本 6. |
 |                  7.2.x                   |  iOS 7   | OS X 10.9  | Xcode 最低版本 6. |
 |         7.1.x / AFNetworking-3.x         |  iOS 7   | OS X 10.9  | Xcode 最低版本 6. |