diff --git a/src/Directory.Packages.props b/src/Directory.Packages.props
index b1c9b7aa..1032dcd2 100644
--- a/src/Directory.Packages.props
+++ b/src/Directory.Packages.props
@@ -21,7 +21,7 @@
     <PackageVersion Include="NetTopologySuite" Version="2.6.0" />
     <PackageVersion Include="NUnit" Version="4.6.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.2.0" />
-    <PackageVersion Include="Polyfill" Version="10.4.0" />
+    <PackageVersion Include="Polyfill" Version="10.5.1" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.174" />
     <PackageVersion Include="System.Data.SqlClient" Version="4.9.1" />
     <PackageVersion Include="System.Drawing.Common" Version="10.0.7" />