diff --git a/src/Extensaur/Extensaur.csproj b/src/Extensaur/Extensaur.csproj
index df5d767..a9ae77d 100644
--- a/src/Extensaur/Extensaur.csproj
+++ b/src/Extensaur/Extensaur.csproj
@@ -12,7 +12,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Polyfill" Version="9.12.0">
+    <PackageReference Include="Polyfill" Version="9.13.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
diff --git a/test/Extensaur.Performance/Extensaur.Performance.csproj b/test/Extensaur.Performance/Extensaur.Performance.csproj
index 3c7d396..6db8264 100644
--- a/test/Extensaur.Performance/Extensaur.Performance.csproj
+++ b/test/Extensaur.Performance/Extensaur.Performance.csproj
@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="BenchmarkDotNet" Version="0.15.8" />
-    <PackageReference Include="Polyfill" Version="9.12.0">
+    <PackageReference Include="Polyfill" Version="9.13.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>