diff --git a/src/DemaConsulting.SpdxModel/DemaConsulting.SpdxModel.csproj b/src/DemaConsulting.SpdxModel/DemaConsulting.SpdxModel.csproj
index 38c459d..2c3369d 100644
--- a/src/DemaConsulting.SpdxModel/DemaConsulting.SpdxModel.csproj
+++ b/src/DemaConsulting.SpdxModel/DemaConsulting.SpdxModel.csproj
@@ -49,7 +49,7 @@
   <!-- Build Tool Dependencies -->
   <ItemGroup>
     <PackageReference Include="Microsoft.Sbom.Targets" Version="4.1.5" PrivateAssets="All" />
-    <PackageReference Include="Polyfill" Version="9.12.0" PrivateAssets="All" />
+    <PackageReference Include="Polyfill" Version="9.13.0" PrivateAssets="All" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="10.0.103" PrivateAssets="All" />
   </ItemGroup>