diff --git a/tests/Wolfgang.TryPattern.Tests.Unit/Wolfgang.TryPattern.Tests.Unit.csproj b/tests/Wolfgang.TryPattern.Tests.Unit/Wolfgang.TryPattern.Tests.Unit.csproj
index 4a3bd72b..16051ffa 100644
--- a/tests/Wolfgang.TryPattern.Tests.Unit/Wolfgang.TryPattern.Tests.Unit.csproj
+++ b/tests/Wolfgang.TryPattern.Tests.Unit/Wolfgang.TryPattern.Tests.Unit.csproj
@@ -128,7 +128,7 @@
 		     Roslyn's compiler-as-a-library requires .NET 6+. The
 		     doc examples are TFM-invariant so verifying once on
 		     net10 is enough. -->
-		<PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.6.0" />
+		<PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" />
 	</ItemGroup>
 
 	<ItemGroup>