diff --git a/NuGet.Config b/NuGet.Config
index 57d1a49d..2ba7bfbf 100644
--- a/NuGet.Config
+++ b/NuGet.Config
@@ -18,7 +18,7 @@
     <packageSource key="Windows Community Toolkit CI">
       <package pattern="CommunityToolkit.WinUI.*" />
     </packageSource>
-    <packageSource key="nuget.org">
+    <packageSource key="NuGet official package source">
       <package pattern="*" />
     </packageSource>
   </packageSourceMapping>
diff --git a/src/Directory.Packages.props b/src/Directory.Packages.props
index 9ddc0184..267594c4 100644
--- a/src/Directory.Packages.props
+++ b/src/Directory.Packages.props
@@ -88,7 +88,7 @@
   <ItemGroup Label="FSharp">
     <PackageVersion Include="Elmish" Version="$(ElmishVersion)" />
     <PackageVersion Include="Elmish.Uno" Version="1.0.0-ci" />
-    <PackageVersion Include="FSharp.Collections.Immutable" Version="2.0.0-ci-4000372498" />
+    <PackageVersion Include="FSharp.Collections.Immutable" Version="2.0.0-ci-853395216" />
     <PackageVersion Include="FSharp.Control.FusionTasks" Version="2.5.0" />
     <PackageVersion Include="FSharp.Control.Reactive" Version="5.0.2" />
     <PackageVersion Include="FSharpPlus" Version="1.2.0" />