diff --git a/src/Directory.Packages.props b/src/Directory.Packages.props
index 4f8a2f3..c5ba5d1 100644
--- a/src/Directory.Packages.props
+++ b/src/Directory.Packages.props
@@ -14,7 +14,7 @@
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.2" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
-    <PackageVersion Include="Polyfill" Version="6.3.0" />
+    <PackageVersion Include="Polyfill" Version="6.4.0" />
     <PackageVersion Include="Verify.SourceGenerators" Version="2.3.0" />
     <PackageVersion Include="Verify.Xunit" Version="26.2.0" />
     <PackageVersion Include="xunit" Version="2.9.0" />