diff --git a/package-versions.props b/package-versions.props
index f87a534a35..42eed83c80 100644
--- a/package-versions.props
+++ b/package-versions.props
@@ -24,7 +24,7 @@
     <MiniValidationVersion>0.9.*</MiniValidationVersion>
     <NSwagApiClientVersion>14.6.*</NSwagApiClientVersion>
     <NewtonsoftJsonVersion>13.0.*</NewtonsoftJsonVersion>
-    <PolyfillVersion>9.8.*</PolyfillVersion>
+    <PolyfillVersion>9.9.*</PolyfillVersion>
     <ReadableExpressionsVersion>4.1.*</ReadableExpressionsVersion>
     <ScalarAspNetCoreVersion>2.12.*</ScalarAspNetCoreVersion>
     <SwashbuckleVersion>10.*-*</SwashbuckleVersion>