diff --git a/test/LibYear.Core.Tests/LibYear.Core.Tests.csproj b/test/LibYear.Core.Tests/LibYear.Core.Tests.csproj
index 75d780f..9a4bd4a 100644
--- a/test/LibYear.Core.Tests/LibYear.Core.Tests.csproj
+++ b/test/LibYear.Core.Tests/LibYear.Core.Tests.csproj
@@ -7,7 +7,7 @@
 	<ItemGroup>
 		<PackageReference Include="coverlet.collector" Version="10.0.1" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.7.0" />
-		<PackageReference Include="NSubstitute" Version="5.3.0" />
+		<PackageReference Include="NSubstitute" Version="6.0.0" />
 		<PackageReference Include="xunit" Version="2.9.3" />
 		<PackageReference Include="xunit.runner.visualstudio" Version="3.1.5" />
 		<ProjectReference Include="../../src/LibYear.Core/LibYear.Core.csproj" />