diff --git a/src/Html2Markdown/Html2Markdown.csproj b/src/Html2Markdown/Html2Markdown.csproj
index 53a4b897..b75ffe22 100644
--- a/src/Html2Markdown/Html2Markdown.csproj
+++ b/src/Html2Markdown/Html2Markdown.csproj
@@ -12,6 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="HtmlAgilityPack" Version="1.5.0" />
+    <PackageReference Include="AngleSharp" Version="0.9.9" />
   </ItemGroup>
 
 </Project>