diff --git a/src/Properties/AssemblyInfo.cs b/src/Properties/AssemblyInfo.cs
index 77e3acf..78f4a31 100644
--- a/src/Properties/AssemblyInfo.cs
+++ b/src/Properties/AssemblyInfo.cs
@@ -14,7 +14,6 @@ using System.Runtime.Versioning;
 [assembly: AssemblyCopyright("Copyright ©  2021-2023")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
-[assembly: SupportedOSPlatform("windows")]
 
 // Setting ComVisible to false makes the types in this assembly not visible
 // to COM components.  If you need to access a type in this assembly from
diff --git a/src/RhSolutions.csproj b/src/RhSolutions.csproj
index c1801cd..8db6006 100644
--- a/src/RhSolutions.csproj
+++ b/src/RhSolutions.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0-windows</TargetFramework>
+    <TargetFrameworks>net472;net6.0-windows</TargetFrameworks>
     <OutputType>Library</OutputType>
     <RootNamespace>RhSolutions.AddIn</RootNamespace>
     <AssemblyName>RhSolutions.AddIn</AssemblyName>
@@ -17,5 +17,6 @@
     <PackageReference Include="ExcelDna.Interop" Version="15.0.0" />
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
+    <PackageReference Include="System.Net.Http" Version="4.3.4" />
   </ItemGroup>
 </Project>
\ No newline at end of file