diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index bdbed3f3b5..a91ec77761 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -35,7 +35,7 @@ jobs:
         $process = New-Object System.Diagnostics.Process
         $process.StartInfo = $startInfo
         $process.Start()
-        $process.WaitForExit()        
+        $process.WaitForExit()
         
     - name: Checkout
       uses: actions/checkout@v2
diff --git a/src/ReactiveUI.WinUI/ReactiveUI.WinUI.csproj b/src/ReactiveUI.WinUI/ReactiveUI.WinUI.csproj
index 665d625051..32f9b49cc5 100644
--- a/src/ReactiveUI.WinUI/ReactiveUI.WinUI.csproj
+++ b/src/ReactiveUI.WinUI/ReactiveUI.WinUI.csproj
@@ -1,9 +1,8 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net5.0-windows10.0.19041.0;net6.0-windows10.0.19041.0</TargetFrameworks>
+    <TargetFrameworks>net5.0-windows10.0.17763.0;net6.0-windows10.0.17763.0</TargetFrameworks>
     <PackageDescription>Contains the ReactiveUI platform specific extensions for WinUI Desktop</PackageDescription>
     <RootNamespace>ReactiveUI.WinUI.Desktop</RootNamespace>
-    <RuntimeIdentifiers>win10-x86;win10-x64</RuntimeIdentifiers>
     <DefineConstants>HAS_WINUI</DefineConstants>
     <PackageTags>mvvm;reactiveui;rx;reactive extensions;observable;LINQ;events;winui</PackageTags>
     <UseWinUI>true</UseWinUI>
@@ -11,9 +10,16 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.ProjectReunion" Version="0.8.5" />
+    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.0.0-preview3" />
   </ItemGroup>
 
+  <!-- Workaround for https://github.com/microsoft/WindowsAppSDK/issues/1217 -->
+  <Target Name="FixReferenceCopyLocalPaths" BeforeTargets="ResolvePackageAssets">
+    <ItemGroup>
+      <ReferenceCopyLocalPaths Remove="$(PkgMicrosoft_WindowsAppSDK)\build\..\runtimes\lib\native\AnyCPU\Microsoft.WindowsAppRuntime.Bootstrap.dll"/>
+    </ItemGroup>
+  </Target>
+
   <ItemGroup>
     <ProjectReference Include="..\ReactiveUI\ReactiveUI.csproj" />
   </ItemGroup>