diff --git a/Protacon.NetCore.WebApi.TestUtil/Protacon.NetCore.WebApi.TestUtil.csproj b/Protacon.NetCore.WebApi.TestUtil/Protacon.NetCore.WebApi.TestUtil.csproj
index 3a3011d..b98e210 100644
--- a/Protacon.NetCore.WebApi.TestUtil/Protacon.NetCore.WebApi.TestUtil.csproj
+++ b/Protacon.NetCore.WebApi.TestUtil/Protacon.NetCore.WebApi.TestUtil.csproj
@@ -13,6 +13,6 @@
   <ItemGroup Condition=" '$(TargetFramework)' == 'net6.0' ">
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="6.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="6.0.0" />
-    <PackageReference Include="System.Text.Json" Version="6.0.0" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
   </ItemGroup>
 </Project>