diff --git a/src/iTextSharp.LGPLv2.Core/iTextSharp.LGPLv2.Core.csproj b/src/iTextSharp.LGPLv2.Core/iTextSharp.LGPLv2.Core.csproj
index b17c9cc..6cb1d62 100644
--- a/src/iTextSharp.LGPLv2.Core/iTextSharp.LGPLv2.Core.csproj
+++ b/src/iTextSharp.LGPLv2.Core/iTextSharp.LGPLv2.Core.csproj
@@ -45,6 +45,7 @@
     <ItemGroup>
         <Using Include="System.Globalization"/>
         <Using Include="System.IO"/>
+        <Using Remove="System.Net.Http" /> <!-- for .NET Framework 4.x -->
     </ItemGroup>
     <ItemGroup>
         <PackageReference Include="SkiaSharp" Version="2.88.5"/>