diff --git a/source/DefaultUnDo.Test/DefaultUnDo.Test.csproj b/source/DefaultUnDo.Test/DefaultUnDo.Test.csproj
index 328bfbe..092f6be 100644
--- a/source/DefaultUnDo.Test/DefaultUnDo.Test.csproj
+++ b/source/DefaultUnDo.Test/DefaultUnDo.Test.csproj
@@ -1,4 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
+
   <PropertyGroup>
     <TargetFrameworks>
       net462;
@@ -9,14 +10,15 @@
 
   <ItemGroup>
     <PackageReference Include="coverlet.msbuild" Version="6.0.0" PrivateAssets="all" />
-	<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="NFluent" Version="3.0.3" />
     <PackageReference Include="NSubstitute" Version="5.1.0" />
-    <PackageReference Include="xunit" Version="2.6.5" />
+    <PackageReference Include="xunit" Version="2.6.6" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6" PrivateAssets="all" />
   </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\DefaultUnDo\DefaultUnDo.csproj" />
   </ItemGroup>
+
 </Project>
\ No newline at end of file
diff --git a/source/DefaultUnDo/DefaultUnDo.csproj b/source/DefaultUnDo/DefaultUnDo.csproj
index 926f76b..1473039 100644
--- a/source/DefaultUnDo/DefaultUnDo.csproj
+++ b/source/DefaultUnDo/DefaultUnDo.csproj
@@ -3,6 +3,7 @@
   <PropertyGroup Label="Compilation">
     <TargetFrameworks>
       netstandard1.0;
+      netstandard2.0;
       netstandard2.1;
       net8.0;
     </TargetFrameworks>