diff --git a/tests/FactSet.SDK.Utils.Tests/FactSet.SDK.Utils.Tests.csproj b/tests/FactSet.SDK.Utils.Tests/FactSet.SDK.Utils.Tests.csproj
index 1175d46..1ac2f88 100644
--- a/tests/FactSet.SDK.Utils.Tests/FactSet.SDK.Utils.Tests.csproj
+++ b/tests/FactSet.SDK.Utils.Tests/FactSet.SDK.Utils.Tests.csproj
@@ -9,7 +9,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="Moq" Version="4.20.69" />
-    <PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="NUnit" Version="4.0.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageReference Include="coverlet.collector" Version="6.0.0" />
   </ItemGroup>