diff --git a/source/Tests/Tests.csproj b/source/Tests/Tests.csproj
index bd9d0a1..69f7c57 100644
--- a/source/Tests/Tests.csproj
+++ b/source/Tests/Tests.csproj
@@ -11,7 +11,7 @@
       <PackageReference Include="NUnit" Version="3.13.3" />
       <PackageReference Include="Serilog" Version="2.12.0" />
       <PackageReference Include="Serilog.Sinks.TextWriter" Version="2.1.0" />
-      <PackageReference Include="NSubstitute" Version="4.4.0" />
+      <PackageReference Include="NSubstitute" Version="5.0.0" />
       <PackageReference Include="FluentAssertions" Version="6.7.0" />
       <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
       <PackageReference Include="TeamCity.VSTest.TestAdapter" Version="1.0.36" />