diff --git a/EchoTcpServerTests/EchoTcpServerTests.csproj b/EchoTcpServerTests/EchoTcpServerTests.csproj
index 7e35cd8..278e832 100644
--- a/EchoTcpServerTests/EchoTcpServerTests.csproj
+++ b/EchoTcpServerTests/EchoTcpServerTests.csproj
@@ -18,7 +18,7 @@
     <PackageReference Include="NetArchTest.Rules" Version="1.3.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
-    <PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="NUnit" Version="4.5.1" />
     <PackageReference Include="NUnit.Analyzers" Version="3.9.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
diff --git a/NetSdrClientAppTests/NetSdrClientAppTests.csproj b/NetSdrClientAppTests/NetSdrClientAppTests.csproj
index c1f4c1d..a4e8490 100644
--- a/NetSdrClientAppTests/NetSdrClientAppTests.csproj
+++ b/NetSdrClientAppTests/NetSdrClientAppTests.csproj
@@ -18,7 +18,7 @@
     <PackageReference Include="NetArchTest.Rules" Version="1.3.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
-    <PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="NUnit" Version="4.5.1" />
     <PackageReference Include="NUnit.Analyzers" Version="3.9.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>