diff --git a/build/targets/compiler/Packages.props b/build/targets/compiler/Packages.props
index 2c0e2bb2c..0d2cc33b5 100644
--- a/build/targets/compiler/Packages.props
+++ b/build/targets/compiler/Packages.props
@@ -1,5 +1,5 @@
 <Project>
   <ItemGroup>
-    <PackageVersion Include="Polyfill" Version="9.5.0" />
+    <PackageVersion Include="Polyfill" Version="9.9.0" />
   </ItemGroup>
 </Project>