diff --git a/Grasshopper/SAM.Core.Grasshopper.Excel/app.config b/Grasshopper/SAM.Core.Grasshopper.Excel/app.config
deleted file mode 100644
index f10b4ac..0000000
--- a/Grasshopper/SAM.Core.Grasshopper.Excel/app.config
+++ /dev/null
@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>
\ No newline at end of file
diff --git a/SAM_Excel/SAM.Core.Excel/SAM.Core.Excel.csproj b/SAM_Excel/SAM.Core.Excel/SAM.Core.Excel.csproj
index 3635240..e0ec899 100644
--- a/SAM_Excel/SAM.Core.Excel/SAM.Core.Excel.csproj
+++ b/SAM_Excel/SAM.Core.Excel/SAM.Core.Excel.csproj
@@ -24,6 +24,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="NetOfficeFw.Excel" Version="1.9.7" />
+    <PackageReference Include="System.Text.Json" Version="8.0.5" />
   </ItemGroup>
   <ItemGroup>
     <COMReference Include="VBIDE">