diff --git a/source/Tests/Tests.csproj b/source/Tests/Tests.csproj
index a61a1c0..9e61035 100644
--- a/source/Tests/Tests.csproj
+++ b/source/Tests/Tests.csproj
@@ -8,7 +8,7 @@
     <PackageReference Include="NSubstitute" Version="3.1.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.8.0" />
     <PackageReference Include="NUnit" Version="3.10.1" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.10.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
     <PackageReference Include="Assent" Version="1.3.0" />
   </ItemGroup>
   <ItemGroup>