diff --git a/csharp/PhoneNumbers.Test/PhoneNumbers.Test.csproj b/csharp/PhoneNumbers.Test/PhoneNumbers.Test.csproj
index 122fa2866..342e0af37 100644
--- a/csharp/PhoneNumbers.Test/PhoneNumbers.Test.csproj
+++ b/csharp/PhoneNumbers.Test/PhoneNumbers.Test.csproj
@@ -18,10 +18,10 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
     <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
-    <PackageReference Include="xunit" Version="2.8.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.0">
+    <PackageReference Include="xunit" Version="2.8.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>