diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f41d31..cca2f38 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+**2024-08-23**
+
+v8.5.1
+
+修复：对象存储，分片并发上传实现非预期
+
 **2023-12-11**
 
 v8.5.0
diff --git a/src/Qiniu/Qiniu.csproj b/src/Qiniu/Qiniu.csproj
index 17016b6..a166e1a 100644
--- a/src/Qiniu/Qiniu.csproj
+++ b/src/Qiniu/Qiniu.csproj
@@ -28,7 +28,7 @@
     <PostBuildEvent>
     </PostBuildEvent>
     <ProjectId>Qiniu</ProjectId>
-    <Version>8.5.0</Version>
+    <Version>8.5.1</Version>
     <Authors>Rong Zhou, Qiniu SDK</Authors>
     <Company>Shanghai Qiniu Information Technology Co., Ltd.</Company>
     <Description>Qiniu Resource (Cloud) Storage SDK for C#</Description>
diff --git a/src/Qiniu/QiniuCSharpSDK.cs b/src/Qiniu/QiniuCSharpSDK.cs
index 23c8e7b..65e023a 100644
--- a/src/Qiniu/QiniuCSharpSDK.cs
+++ b/src/Qiniu/QiniuCSharpSDK.cs
@@ -37,6 +37,6 @@ public class QiniuCSharpSDK
     /// <summary>
     /// SDK版本号
     /// </summary>
-    public const string VERSION = "8.5.0";
+    public const string VERSION = "8.5.1";
 
 }