diff --git a/src/PublicSuffix.Tests/PublicSuffix.Tests.csproj b/src/PublicSuffix.Tests/PublicSuffix.Tests.csproj
index d8b725c..4f16f9d 100644
--- a/src/PublicSuffix.Tests/PublicSuffix.Tests.csproj
+++ b/src/PublicSuffix.Tests/PublicSuffix.Tests.csproj
@@ -9,7 +9,7 @@
   <ItemGroup>
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     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageReference Include="NUnit" Version="4.2.2" />
+    <PackageReference Include="NUnit" Version="4.3.2" />
     <PackageReference Include="NUnit.Analyzers" Version="4.4.0" PrivateAssets="all" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
   </ItemGroup>