diff --git a/src/Directory.build.props b/src/Directory.build.props
index a754b0b94f..de3a72d83d 100644
--- a/src/Directory.build.props
+++ b/src/Directory.build.props
@@ -42,7 +42,7 @@
     <PackageReference Include="FluentAssertions" Version="5.10.3" />
     <PackageReference Include="Microsoft.Reactive.Testing" Version="5.0.0" />
     <PackageReference Include="PublicApiGenerator" Version="10.2.0" />
-    <PackageReference Include="DiffEngine" Version="6.5.7" />
+    <PackageReference Include="DiffEngine" Version="6.5.9" />
     <PackageReference Include="coverlet.msbuild" Version="3.0.3" PrivateAssets="All" />
   </ItemGroup>