diff --git a/src/MessagePack.Generator/MessagePack.Generator.csproj b/src/MessagePack.Generator/MessagePack.Generator.csproj
index bde486a06..0438acdb8 100644
--- a/src/MessagePack.Generator/MessagePack.Generator.csproj
+++ b/src/MessagePack.Generator/MessagePack.Generator.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <AssemblyName>mpc</AssemblyName>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
     <LangVersion>8</LangVersion>
     <Nullable>enable</Nullable>
     <IsPackable>true</IsPackable>
@@ -22,7 +22,7 @@
     <PackageReference Include="Microsoft.Build.Locator" Version="1.2.6" />
     <PackageReference Include="Microsoft.Build.Framework" Version="16.0.461" ExcludeAssets="runtime" />
     <PackageReference Include="Microsoft.Build" Version="16.0.461" ExcludeAssets="runtime" />
-    <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="3.6.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="3.8.0" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/MessagePack.GeneratorCore/MessagePack.GeneratorCore.csproj b/src/MessagePack.GeneratorCore/MessagePack.GeneratorCore.csproj
index 4be9ff608..866eff8d0 100644
--- a/src/MessagePack.GeneratorCore/MessagePack.GeneratorCore.csproj
+++ b/src/MessagePack.GeneratorCore/MessagePack.GeneratorCore.csproj
@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="3.6.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="3.8.0" />
     <PackageReference Include="Microsoft.Build" Version="15.9.20" />
     <PackageReference Include="System.CodeDom" Version="4.7.0" />
   </ItemGroup>
diff --git a/tests/MessagePack.Generator.Tests/MessagePack.Generator.Tests.csproj b/tests/MessagePack.Generator.Tests/MessagePack.Generator.Tests.csproj
index 08a0c8028..05b646fe7 100644
--- a/tests/MessagePack.Generator.Tests/MessagePack.Generator.Tests.csproj
+++ b/tests/MessagePack.Generator.Tests/MessagePack.Generator.Tests.csproj
@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="FluentAssertions" Version="5.10.3" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.6.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.8.0" />
 
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />