diff --git a/source/DirectoryServices.Tests/DirectoryServices.Tests.csproj b/source/DirectoryServices.Tests/DirectoryServices.Tests.csproj
index 804131e..3514a3e 100644
--- a/source/DirectoryServices.Tests/DirectoryServices.Tests.csproj
+++ b/source/DirectoryServices.Tests/DirectoryServices.Tests.csproj
@@ -8,7 +8,7 @@
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     <PackageReference Include="NSubstitute" Version="3.1.0" />
     <PackageReference Include="NUnit" Version="3.10.1" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.10.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
     <PackageReference Include="Octopus.Time" Version="1.1.6" />
     <PackageReference Include="Shouldly" Version="4.0.3" />
   </ItemGroup>