diff --git a/vs4win/Chapter04/Ch04Ex02PrimeFactorsTests/Ch04Ex02PrimeFactorsTests.csproj b/vs4win/Chapter04/Ch04Ex02PrimeFactorsTests/Ch04Ex02PrimeFactorsTests.csproj
index 2ac4e3d..549c934 100644
--- a/vs4win/Chapter04/Ch04Ex02PrimeFactorsTests/Ch04Ex02PrimeFactorsTests.csproj
+++ b/vs4win/Chapter04/Ch04Ex02PrimeFactorsTests/Ch04Ex02PrimeFactorsTests.csproj
@@ -9,13 +9,13 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
-    <PackageReference Include="xunit" Version="2.4.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.4.0" />
+    <PackageReference Include="xunit" Version="2.4.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="3.1.0">
+    <PackageReference Include="coverlet.collector" Version="3.2.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>