diff --git a/NGitLab.Tests/NGitLab.Tests.csproj b/NGitLab.Tests/NGitLab.Tests.csproj
index d0cdbcbc..314a6314 100644
--- a/NGitLab.Tests/NGitLab.Tests.csproj
+++ b/NGitLab.Tests/NGitLab.Tests.csproj
@@ -19,7 +19,7 @@
     <PackageReference Include="NuGet.Versioning" Version="6.7.0" />
     <PackageReference Include="NUnit" Version="3.13.3" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
-    <PackageReference Include="NSubstitute" Version="5.0.0" />
+    <PackageReference Include="NSubstitute" Version="5.1.0" />
     <PackageReference Include="Polly" Version="7.2.4" />
     <PackageReference Include="System.Text.Json" Version="7.0.3" />
     <PackageReference Include="coverlet.collector" Version="6.0.0">