diff --git a/tests/MyNihongo.Option.Tests.csproj b/tests/MyNihongo.Option.Tests.csproj
index c78aa75..87cd791 100644
--- a/tests/MyNihongo.Option.Tests.csproj
+++ b/tests/MyNihongo.Option.Tests.csproj
@@ -25,7 +25,7 @@
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
 		<PackageReference Include="FluentAssertions" Version="6.12.0" />
-		<PackageReference Include="xunit" Version="2.6.2" />
+		<PackageReference Include="xunit" Version="2.9.3" />
 		<PackageReference Include="xunit.runner.visualstudio" Version="2.5.4">
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 			<PrivateAssets>all</PrivateAssets>