diff --git a/src/ReactiveUI/ReactiveUI.csproj b/src/ReactiveUI/ReactiveUI.csproj
index 5f890344d..ee2482c0b 100644
--- a/src/ReactiveUI/ReactiveUI.csproj
+++ b/src/ReactiveUI/ReactiveUI.csproj
@@ -54,11 +54,24 @@
   </ItemGroup>
   <ItemGroup Condition=" $(TargetFramework.StartsWith('net4')) or '$(TargetFramework)' == 'net6.0' or '$(TargetFramework)' == 'net7.0' or '$(TargetFramework)' == 'net8.0' or $(TargetFramework.EndsWith('-windows10.0.17763.0')) or $(TargetFramework.EndsWith('-windows10.0.19041.0')) ">
     <Compile Include="Platforms\net\**\*.cs" />
-    <PackageReference Include="System.ComponentModel.Annotations" />
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Splat" />
     <PackageReference Include="DynamicData" />
+  </ItemGroup>
+  <ItemGroup Condition="$(TargetFramework.StartsWith('net4'))">
+    <PackageReference Include="System.Text.Json" />
+    <PackageReference Include="System.ComponentModel.Annotations" />
+  </ItemGroup>
+  <ItemGroup Condition=" $(TargetFramework.StartsWith('netstandard')) ">
+    <PackageReference Include="System.ComponentModel" />
+    <PackageReference Include="System.ComponentModel.Annotations" />
+    <PackageReference Include="System.Diagnostics.Contracts" />
+    <PackageReference Include="System.Dynamic.Runtime" />
+    <PackageReference Include="System.Runtime.Serialization.Primitives" />
+    <PackageReference Include="System.Text.Json" />
+  </ItemGroup>
+  <ItemGroup Condition="$(TargetFramework.StartsWith('net6'))">
     <PackageReference Include="System.Text.Json" />
   </ItemGroup>
   <ItemGroup>