diff --git a/dev/MRTCore/build/DownloadDotNetRuntimeInstaller.ps1 b/dev/MRTCore/build/DownloadDotNetRuntimeInstaller.ps1
index e44c1b8dd4..c416815a69 100644
--- a/dev/MRTCore/build/DownloadDotNetRuntimeInstaller.ps1
+++ b/dev/MRTCore/build/DownloadDotNetRuntimeInstaller.ps1
@@ -13,8 +13,8 @@ if(!(Test-Path $outputDir))
 }
 
 # Find direct download links at https://dotnet.microsoft.com/download/dotnet/5.0
-$downloadurlx86 = "https://download.visualstudio.microsoft.com/download/pr/a8dcbda1-8720-453c-9ec6-5a9d90935643/28754321a8b966f1ce837e6f59035b48/windowsdesktop-runtime-5.0.3-win-x86.exe"
-$downloadurlx64 = "https://download.visualstudio.microsoft.com/download/pr/c6541c87-42f2-4c5d-b6db-2df0dade5e00/13e89a5fec3ddb224cd93dd18b0761ff/windowsdesktop-runtime-5.0.3-win-x64.exe"
+$downloadurlx86 = "https://download.visualstudio.microsoft.com/download/pr/c089205d-4f58-4f8d-ad84-c92eaf2f3411/5cd3f9b3bd089c09df14dbbfb64124a4/windowsdesktop-runtime-5.0.5-win-x86.exe"
+$downloadurlx64 = "https://download.visualstudio.microsoft.com/download/pr/c1ef0b3f-9663-4fc5-85eb-4a9cadacdb87/52b890f91e6bd4350d29d2482038df1c/windowsdesktop-runtime-5.0.5-win-x64.exe"
 
 if($arch -eq "x86")
 {
diff --git a/dev/MRTCore/build/versions.props b/dev/MRTCore/build/versions.props
index eb574443e2..e9db4e55f4 100644
--- a/dev/MRTCore/build/versions.props
+++ b/dev/MRTCore/build/versions.props
@@ -20,8 +20,8 @@
     <CurrentLiftedIXPPackageVersion>10.0.20170.1001-200713-1000.rs-onecore-dep-ixp1</CurrentLiftedIXPPackageVersion>
     <CurrentWilPackageVersion>1.0.190716.2</CurrentWilPackageVersion>
     <MuxCustomBuildTasksPackageVersion>1.0.83-winui3</MuxCustomBuildTasksPackageVersion>
-    <DotNetCoreSdkVersion>5.0.103</DotNetCoreSdkVersion>
-    <DotNetCoreRuntimeVersion>5.0.3</DotNetCoreRuntimeVersion>
+    <DotNetCoreSdkVersion>5.0.202</DotNetCoreSdkVersion>
+    <DotNetCoreRuntimeVersion>5.0.5</DotNetCoreRuntimeVersion>
     <DetoursVersion>4.0.1</DetoursVersion>
     <CppWinRTVersion>2.0.191217.1</CppWinRTVersion>
     <MicrosoftSourceLinkAzureReposVersion>1.0.0</MicrosoftSourceLinkAzureReposVersion>
diff --git a/dev/MRTCore/global.json b/dev/MRTCore/global.json
index abcf21d353..4715e75eee 100644
--- a/dev/MRTCore/global.json
+++ b/dev/MRTCore/global.json
@@ -1,6 +1,6 @@
 {
     "sdk": {
-        "version": "5.0.103"
+        "version": "5.0.202"
     },
     "msbuild-sdks": {
         "Microsoft.Build.NoTargets" : "1.0.88"
diff --git a/dev/MRTCore/mrt/Microsoft.ApplicationModel.Resources/projection/Microsoft.ApplicationModel.Resources.Projection.csproj b/dev/MRTCore/mrt/Microsoft.ApplicationModel.Resources/projection/Microsoft.ApplicationModel.Resources.Projection.csproj
index 8de3e85701..4e7fbc9779 100644
--- a/dev/MRTCore/mrt/Microsoft.ApplicationModel.Resources/projection/Microsoft.ApplicationModel.Resources.Projection.csproj
+++ b/dev/MRTCore/mrt/Microsoft.ApplicationModel.Resources/projection/Microsoft.ApplicationModel.Resources.Projection.csproj
@@ -8,9 +8,15 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="1.2.0" />
+    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="1.2.1" />
   </ItemGroup>
-  
+
+  <!-- For consistency across Reunion, explicitly reference .NET 5.0.5 SDK (5.0.202 train for VS 16.9.3) -->
+  <ItemGroup>
+    <FrameworkReference Update="Microsoft.Windows.SDK.NET.Ref" RuntimeFrameworkVersion="10.0.18362.15" />
+    <FrameworkReference Update="Microsoft.Windows.SDK.NET.Ref" TargetingPackVersion="10.0.18362.15" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\src\Microsoft.ApplicationModel.Resources.vcxproj" />
   </ItemGroup>