diff --git a/Directory.Packages.props b/Directory.Packages.props
index e051fb58..ea98b9fd 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -25,7 +25,7 @@
     <PackageVersion Include="TUnit" Version="1.65.38" />
     <PackageVersion Include="TUnit.AspNetCore" Version="1.65.38" />
     <PackageVersion Include="EssentialCSharp.Shared.Models" Version="$(ToolingPackagesVersion)" />
-    <PackageVersion Include="HtmlAgilityPack" Version="1.12.4" />
+    <PackageVersion Include="HtmlAgilityPack" Version="1.13.0" />
     <PackageVersion Include="IntelliTect.Multitool" Version="2.1.0" />
     <PackageVersion Include="Mailjet.Api" Version="4.0.1" />
     <PackageVersion Include="Microsoft.AspNetCore.Authentication.MicrosoftAccount" Version="10.0.11" />
diff --git a/EssentialCSharp.Web/Controllers/HomeController.cs b/EssentialCSharp.Web/Controllers/HomeController.cs
index 8829bd0e..11072575 100644
--- a/EssentialCSharp.Web/Controllers/HomeController.cs
+++ b/EssentialCSharp.Web/Controllers/HomeController.cs
@@ -31,8 +31,8 @@ public IActionResult Index()
             string filePath = Path.Join(hostingEnvironment.ContentRootPath, Path.Join(siteMapping.PagePath));
             HtmlDocument doc = new();
             doc.Load(filePath);
-            string headHtml = doc.DocumentNode.Element("html").Element("head").InnerHtml;
-            string html = doc.DocumentNode.Element("html").Element("body").InnerHtml;
+            string headHtml = doc.DocumentNode.Element("html")?.Element("head")?.InnerHtml ?? string.Empty;
+            string html = doc.DocumentNode.Element("html")?.Element("body")?.InnerHtml ?? string.Empty;
 
             ViewBag.PageTitle = siteMapping.IndentLevel is 0 ? siteMapping.ChapterTitle + " " + siteMapping.RawHeading : siteMapping.RawHeading;
             ViewBag.NextPage = FlipPage(siteMapping!.ChapterNumber, siteMapping.PageNumber, true);