diff --git a/source/DefaultUnDo.Test/DefaultUnDo.Test.csproj b/source/DefaultUnDo.Test/DefaultUnDo.Test.csproj
index 0082ebd..e73406d 100644
--- a/source/DefaultUnDo.Test/DefaultUnDo.Test.csproj
+++ b/source/DefaultUnDo.Test/DefaultUnDo.Test.csproj
@@ -21,7 +21,7 @@
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     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.6.0" />
     
     <PackageReference Include="coverlet.msbuild" Version="6.0.2" PrivateAssets="all" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" PrivateAssets="all" />