diff --git a/.gitignore b/.gitignore
index b5d8031c..7b2c8c7b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,4 +16,6 @@
 /v2rayN/v2rayUpgrade/bin/Debug
 /v2rayN/v2rayUpgrade/obj/Debug 
 /v2rayN/v2rayUpgrade/bin/Release
-/v2rayN/v2rayUpgrade/obj/Release
\ No newline at end of file
+/v2rayN/v2rayUpgrade/obj/Release
+/.vs/test/v16/.suo
+/v2rayN/v2rayUpgrade/packages.config
diff --git a/v2rayN/v2rayN/packages.config b/v2rayN/v2rayN/packages.config
index 7e993a0a..f5f789c4 100644
--- a/v2rayN/v2rayN/packages.config
+++ b/v2rayN/v2rayN/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Grpc.Tools" version="2.24.0" targetFramework="net46" developmentDependency="true" />
+  <package id="Grpc.Tools" version="2.27.0" targetFramework="net46" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/v2rayN/v2rayN/v2rayN.csproj b/v2rayN/v2rayN/v2rayN.csproj
index 002d99e3..f6d0067c 100644
--- a/v2rayN/v2rayN/v2rayN.csproj
+++ b/v2rayN/v2rayN/v2rayN.csproj
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="..\packages\Grpc.Tools.2.24.0\build\Grpc.Tools.props" Condition="Exists('..\packages\Grpc.Tools.2.24.0\build\Grpc.Tools.props')" />
+  <Import Project="..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.props" Condition="Exists('..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.props')" />
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -439,10 +439,10 @@
     <PropertyGroup>
       <ErrorText>这台计算机上缺少此项目引用的 NuGet 程序包。使用“NuGet 程序包还原”可下载这些程序包。有关更多信息，请参见 http://go.microsoft.com/fwlink/?LinkID=322105。缺少的文件是 {0}。</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Grpc.Tools.2.24.0\build\Grpc.Tools.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Tools.2.24.0\build\Grpc.Tools.props'))" />
-    <Error Condition="!Exists('..\packages\Grpc.Tools.2.24.0\build\Grpc.Tools.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Tools.2.24.0\build\Grpc.Tools.targets'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.props'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.targets'))" />
   </Target>
-  <Import Project="..\packages\Grpc.Tools.2.24.0\build\Grpc.Tools.targets" Condition="Exists('..\packages\Grpc.Tools.2.24.0\build\Grpc.Tools.targets')" />
+  <Import Project="..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.targets" Condition="Exists('..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.targets')" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj b/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj
index a36e3f55..b683e3bc 100644
--- a/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj
+++ b/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.props" Condition="Exists('..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.props')" />
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -13,6 +14,8 @@
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <Deterministic>true</Deterministic>
     <TargetFrameworkProfile />
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
@@ -71,6 +74,7 @@
       <DependentUpon>Resources.resx</DependentUpon>
       <DesignTime>True</DesignTime>
     </Compile>
+    <None Include="packages.config" />
     <None Include="Properties\Settings.settings">
       <Generator>SettingsSingleFileGenerator</Generator>
       <LastGenOutput>Settings.Designer.cs</LastGenOutput>
@@ -85,4 +89,12 @@
     <None Include="App.config" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>这台计算机上缺少此项目引用的 NuGet 程序包。使用“NuGet 程序包还原”可下载这些程序包。有关更多信息，请参见 http://go.microsoft.com/fwlink/?LinkID=322105。缺少的文件是 {0}。</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.props'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.targets'))" />
+  </Target>
+  <Import Project="..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.targets" Condition="Exists('..\packages\Grpc.Tools.2.27.0\build\Grpc.Tools.targets')" />
 </Project>
\ No newline at end of file