diff --git a/Source/Eml.Tests/Eml.Tests.csproj b/Source/Eml.Tests/Eml.Tests.csproj
index 3d51272..6692d92 100644
--- a/Source/Eml.Tests/Eml.Tests.csproj
+++ b/Source/Eml.Tests/Eml.Tests.csproj
@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
-    <PackageReference Include="NUnit" Version="4.1.0" />
+    <PackageReference Include="NUnit" Version="4.2.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/Source/Util.Tests/Util.Tests.csproj b/Source/Util.Tests/Util.Tests.csproj
index a05b993..ecf973a 100644
--- a/Source/Util.Tests/Util.Tests.csproj
+++ b/Source/Util.Tests/Util.Tests.csproj
@@ -13,7 +13,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
-    <PackageReference Include="NUnit" Version="4.1.0" />
+    <PackageReference Include="NUnit" Version="4.2.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageReference Include="NUnit.Analyzers" Version="4.3.0">
       <PrivateAssets>all</PrivateAssets>