diff --git a/csharp/PhoneNumbers.Extensions/PhoneNumbers.Extensions.csproj b/csharp/PhoneNumbers.Extensions/PhoneNumbers.Extensions.csproj
index 8655157a..a32f3196 100644
--- a/csharp/PhoneNumbers.Extensions/PhoneNumbers.Extensions.csproj
+++ b/csharp/PhoneNumbers.Extensions/PhoneNumbers.Extensions.csproj
@@ -36,7 +36,7 @@
     </ItemGroup>
 
     <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-      <PackageReference Include="System.Text.Json" Version="7.0.4" />
+      <PackageReference Include="System.Text.Json" Version="8.0.4" />
     </ItemGroup>
 
 </Project>