diff --git a/source/Octo.Tests/Octo.Tests.csproj b/source/Octo.Tests/Octo.Tests.csproj
index 0d5d8be8a2..d59ca56c1b 100644
--- a/source/Octo.Tests/Octo.Tests.csproj
+++ b/source/Octo.Tests/Octo.Tests.csproj
@@ -24,8 +24,8 @@
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-    <PackageReference Include="NUnit" Version="3.8.1" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.8.0" />
+    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
     <PackageReference Include="TeamCity.VSTest.TestAdapter" Version="1.0.15" />
     <PackageReference Include="Microsoft.AspNetCore.Owin" Version="2.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel" Version="2.0.0" />