diff --git a/src/T4CodeWriter.Sources/build/Raiqub.Generators.T4CodeWriter.Sources.targets b/src/T4CodeWriter.Sources/build/Raiqub.Generators.T4CodeWriter.Sources.targets
index bd80958..421c1e6 100644
--- a/src/T4CodeWriter.Sources/build/Raiqub.Generators.T4CodeWriter.Sources.targets
+++ b/src/T4CodeWriter.Sources/build/Raiqub.Generators.T4CodeWriter.Sources.targets
@@ -1,6 +1,6 @@
 <Project>
   <ItemGroup>
-    <PackageReference Include="Polyfill" Version="8.9.0" PrivateAssets="all" Condition="'$(UsePolyfill)' == 'true'" />
+    <PackageReference Include="Polyfill" Version="8.9.1" PrivateAssets="all" Condition="'$(UsePolyfill)' == 'true'" />
   </ItemGroup>
   <ItemGroup>
     <Compile Update="@(Compile)">