diff --git a/zzio.tests/zzio.tests.csproj b/zzio.tests/zzio.tests.csproj
index d45e3b01..147ed8ef 100644
--- a/zzio.tests/zzio.tests.csproj
+++ b/zzio.tests/zzio.tests.csproj
@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="nunit" Version="4.0.1" />
+    <PackageReference Include="nunit" Version="4.1.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
   </ItemGroup>
diff --git a/zzre.core.tests/zzre.core.tests.csproj b/zzre.core.tests/zzre.core.tests.csproj
index 81d4556d..ba1813ad 100644
--- a/zzre.core.tests/zzre.core.tests.csproj
+++ b/zzre.core.tests/zzre.core.tests.csproj
@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="nunit" Version="4.0.1" />
+    <PackageReference Include="nunit" Version="4.1.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
   </ItemGroup>