diff --git a/SimpleUpdater/FSLib.App.SimpleUpdater.nuspec b/SimpleUpdater/FSLib.App.SimpleUpdater.nuspec
index 6f74d44..a42d81b 100644
--- a/SimpleUpdater/FSLib.App.SimpleUpdater.nuspec
+++ b/SimpleUpdater/FSLib.App.SimpleUpdater.nuspec
@@ -5,7 +5,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
 	<metadata>
 		<id>fishlee.net.simpleupdater</id>
-		<version>4.2.0.0</version>
+		<version>4.2.1.0</version>
 		<authors>iFish(木鱼)</authors>
 		<title>iFish's Simple Application Updater Library</title>
 		<summary>A light weight automatic application updater library for .net 2.0/3.5/4.0/4.5</summary>
@@ -41,12 +41,7 @@
 			<frameworkAssembly assemblyName="System.Windows.Forms"/>
 		</frameworkAssemblies>
 		<releaseNotes>
-			增加支持检测组件ID；
-			增加同步更新以及任务更新模式；
-			修正下载时显示进度的bug；
-			变更获得当前主程序模块以及信息的方法；
-			版本达不到最低版本要求也视作异常；
-			部分逻辑调整优化；
+			Improved compatibility with update using anonymous ftp.
 		</releaseNotes>
 	</metadata>
 
diff --git a/SimpleUpdater/FSLib.App.SimpleUpdater/FSLib.App.SimpleUpdater.DLL_NET4.csproj b/SimpleUpdater/FSLib.App.SimpleUpdater/FSLib.App.SimpleUpdater.DLL_NET4.csproj
index d019434..1b90caf 100644
--- a/SimpleUpdater/FSLib.App.SimpleUpdater/FSLib.App.SimpleUpdater.DLL_NET4.csproj
+++ b/SimpleUpdater/FSLib.App.SimpleUpdater/FSLib.App.SimpleUpdater.DLL_NET4.csproj
@@ -82,6 +82,9 @@
     <Compile Include="Defination\UpdateCheckResult.cs" />
     <Compile Include="Defination\UpdateServerInfo.cs" />
     <Compile Include="Defination\VersionTooLowException.cs" />
+    <Compile Include="Defination\WebClientWrapper.cs">
+      <SubType>Component</SubType>
+    </Compile>
     <Compile Include="DeletePreviousProgramMethod.cs" />
     <Compile Include="Dialogs\AbstractUpdateBase.cs">
       <SubType>Form</SubType>
@@ -392,7 +395,7 @@
   </PropertyGroup>
   <ProjectExtensions>
     <VisualStudio>
-      <UserProperties StartAt="2013/9/7 0:00:00" Versioning="1" IncrementAction="2" IncrementOnBuild="True" IncrementOnRebuild="True" />
+      <UserProperties IncrementOnRebuild="True" IncrementOnBuild="True" IncrementAction="2" Versioning="1" StartAt="2013/9/7 0:00:00" />
     </VisualStudio>
   </ProjectExtensions>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
diff --git a/SimpleUpdater/FSLib.App.SimpleUpdater/Properties/AssemblyInfo.cs b/SimpleUpdater/FSLib.App.SimpleUpdater/Properties/AssemblyInfo.cs
index a82c64b..0eaa9b3 100644
--- a/SimpleUpdater/FSLib.App.SimpleUpdater/Properties/AssemblyInfo.cs
+++ b/SimpleUpdater/FSLib.App.SimpleUpdater/Properties/AssemblyInfo.cs
@@ -34,5 +34,6 @@
 // 可以指定所有这些值，也可以使用“内部版本号”和“修订号”的默认值，
 // 方法是按如下所示使用“*”:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("4.2.1.0")]
+[assembly: AssemblyVersion("4.0.0.0")]
+[assembly: AssemblyFileVersion("4.2.1.0")]
 [assembly: InternalsVisibleTo("自动更新包生成工具, PublicKey=0024000004800000940000000602000000240000525341310004000001000100e9050c06976f6afcd1356ce514383a6b17892ea02e50a4a518de03f0aaf48825cea92691c87367be1783e56e0b59c317fa1b8b5999f87f33eb0ab063faa2c33ea22a2b3279b0770e2ab4653404b7c24a8a2958df44947bcd5c95752b37b034f3972ab299b58c7db56b3b2fccf337de662c3a3b49bfd239a5b4d8f0b0ed1a88cb")]
diff --git a/SimpleUpdater/content/App.config.install.xdt b/SimpleUpdater/content/App.config.install.xdt
index 24ca713..e3bc43b 100644
--- a/SimpleUpdater/content/App.config.install.xdt
+++ b/SimpleUpdater/content/App.config.install.xdt
@@ -27,7 +27,7 @@
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly xdt:Transform="Insert">
         <assemblyIdentity name="SimpleUpdater" publicKeyToken="c532149a76b9a64b"  />
-        <bindingRedirect oldVersion="1.0.0.0-99.99.99.99" newVersion="4.2.0.0" />
+        <bindingRedirect oldVersion="1.0.0.0-99.99.99.99" newVersion="4.0.0.0" />
       </dependentAssembly>
     </assemblyBinding>
   </runtime>