diff --git a/CSharp/OidcSamples/OidcSamples.TaxApp/Pages/Shared/_Layout.cshtml b/CSharp/OidcSamples/OidcSamples.TaxApp/Pages/Shared/_Layout.cshtml
index e3e6ace..472f2b0 100644
--- a/CSharp/OidcSamples/OidcSamples.TaxApp/Pages/Shared/_Layout.cshtml
+++ b/CSharp/OidcSamples/OidcSamples.TaxApp/Pages/Shared/_Layout.cshtml
@@ -1,19 +1,24 @@
 ﻿<!DOCTYPE html>
 <html lang="en">
+
 <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>@ViewData["Title"] - OidcSamples.TaxApp</title>
     <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
     <link rel="stylesheet" href="~/css/site.css" />
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"
+        integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
 </head>
+
 <body>
     <header>
-        <nav class="navbar navbar-expand-sm justify-content-between navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
+        <nav
+            class="navbar navbar-expand-sm justify-content-between navbar-toggleable-sm navbar-light bg-warning border-bottom box-shadow mb-3">
             <div class="container">
                 <a class="navbar-brand" asp-area="" asp-page="/Index">OidcSamples.TaxApp</a>
-                <button class="navbar-toggler" type="button" data-toggle="collapse" data-target=".navbar-collapse" aria-controls="navbarSupportedContent"
-                        aria-expanded="false" aria-label="Toggle navigation">
+                <button class="navbar-toggler" type="button" data-toggle="collapse" data-target=".navbar-collapse"
+                    aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
                     <span class="navbar-toggler-icon"></span>
                 </button>
                 <div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
@@ -47,10 +52,21 @@
         </div>
     </footer>
 
+    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
+        integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
+        crossorigin="anonymous"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"
+        integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49"
+        crossorigin="anonymous"></script>
+    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"
+        integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy"
+        crossorigin="anonymous"></script>
+
     <script src="~/lib/jquery/dist/jquery.min.js"></script>
     <script src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
     <script src="~/js/site.js" asp-append-version="true"></script>
 
     @await RenderSectionAsync("Scripts", required: false)
 </body>
+
 </html>
