diff --git a/src/Windows.Internal.Flighting/Windows.Internal.Flighting.csproj b/src/Windows.Internal.Flighting/Windows.Internal.Flighting.csproj
index 9d73160c..cadf708d 100644
--- a/src/Windows.Internal.Flighting/Windows.Internal.Flighting.csproj
+++ b/src/Windows.Internal.Flighting/Windows.Internal.Flighting.csproj
@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.0.8" />
+    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.1.1" />
   </ItemGroup>
 
   <ItemGroup>