diff --git a/test/LoadTestToolbox.Tests.csproj b/test/LoadTestToolbox.Tests.csproj
index 6ff035e..8068235 100644
--- a/test/LoadTestToolbox.Tests.csproj
+++ b/test/LoadTestToolbox.Tests.csproj
@@ -6,7 +6,7 @@
 	</PropertyGroup>
 	<ItemGroup>
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
-		<PackageReference Include="NSubstitute" Version="6.0.0" />
+		<PackageReference Include="NSubstitute" Version="6.1.0" />
 		<PackageReference Include="Spectre.Console.Testing" Version="0.57.2" />
 		<PackageReference Include="xunit" Version="2.9.3" />
 		<PackageReference Include="xunit.runner.visualstudio" Version="3.1.5" />