diff --git a/eFormAPI/Plugins/Workflow.Pn/Workflow.Pn.Test/Workflow.Pn.Test.csproj b/eFormAPI/Plugins/Workflow.Pn/Workflow.Pn.Test/Workflow.Pn.Test.csproj
index bcf7ed6..bf1880b 100644
--- a/eFormAPI/Plugins/Workflow.Pn/Workflow.Pn.Test/Workflow.Pn.Test.csproj
+++ b/eFormAPI/Plugins/Workflow.Pn/Workflow.Pn.Test/Workflow.Pn.Test.csproj
@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="NSubstitute" Version="5.3.0" />
+    <PackageReference Include="NSubstitute" Version="6.0.0" />
     <PackageReference Include="NUnit" Version="4.6.1" />
     <PackageReference Include="NUnit.Analyzers" Version="4.14.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>