diff --git a/src/Directory.Build.props b/src/Directory.Build.props
index 0fb4df8..4c39547 100644
--- a/src/Directory.Build.props
+++ b/src/Directory.Build.props
@@ -35,7 +35,7 @@
 
   <ItemGroup>
     <PackageReference Include="ConfigureAwaitChecker.Analyzer" Version="5.0.0.1" PrivateAssets="All" />
-    <PackageReference Include="Polyfill " Version="9.13.0" PrivateAssets="All" />
+    <PackageReference Include="Polyfill " Version="9.23.0" PrivateAssets="All" />
   </ItemGroup>
 
 </Project>