diff --git a/SOURCE/Directory.Packages.props b/SOURCE/Directory.Packages.props
index 8381f10..49049f9 100644
--- a/SOURCE/Directory.Packages.props
+++ b/SOURCE/Directory.Packages.props
@@ -22,7 +22,7 @@
   <ItemGroup Label="Testing">
     <PackageVersion Include="coverlet.collector" Version="10.0.1" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
-    <PackageVersion Include="NSubstitute" Version="5.3.0" />
+    <PackageVersion Include="NSubstitute" Version="6.0.0" />
     <PackageVersion Include="xunit" Version="2.9.3" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
   </ItemGroup>