diff --git a/Aspectus.Tests/Aspectus.Tests.csproj b/Aspectus.Tests/Aspectus.Tests.csproj
index c4a41c0..d5bef5f 100644
--- a/Aspectus.Tests/Aspectus.Tests.csproj
+++ b/Aspectus.Tests/Aspectus.Tests.csproj
@@ -21,7 +21,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.6.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
     <PackageReference Include="NETStandard.Library" Version="2.0.3" />
-    <PackageReference Include="NSubstitute" Version="6.0.0" />
+    <PackageReference Include="NSubstitute" Version="6.1.0" />
     <PackageReference Include="Serilog.Extensions.Logging" Version="10.0.0" />
     <PackageReference Include="Serilog.Sinks.File" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="10.0.10" />