diff --git a/test/C3D/Extensions/Logging/Xunit/Test/C3D.Extensions.Logging.Xunit.Tests.csproj b/test/C3D/Extensions/Logging/Xunit/Test/C3D.Extensions.Logging.Xunit.Tests.csproj
index edbe261..b3784e1 100644
--- a/test/C3D/Extensions/Logging/Xunit/Test/C3D.Extensions.Logging.Xunit.Tests.csproj
+++ b/test/C3D/Extensions/Logging/Xunit/Test/C3D.Extensions.Logging.Xunit.Tests.csproj
@@ -24,7 +24,7 @@
     <PackageReference Include="Microsoft.Extensions.TimeProvider.Testing" Version="8.10.0" />
     <PackageReference Include="System.Text.Json" Version="8.0.5" />
 
-    <PackageReference Include="System.Collections.Immutable" Version="8.0.0" />
+    <PackageReference Include="System.Collections.Immutable" Version="9.0.1" />
 
     <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="8.0.1" />
   </ItemGroup>