diff --git a/CSharp/OidcSamples/OidcSamples.AuthorizationServer/Views/Shared/_Layout.cshtml b/CSharp/OidcSamples/OidcSamples.AuthorizationServer/Views/Shared/_Layout.cshtml
index 3bc286d..867f1a9 100644
--- a/CSharp/OidcSamples/OidcSamples.AuthorizationServer/Views/Shared/_Layout.cshtml
+++ b/CSharp/OidcSamples/OidcSamples.AuthorizationServer/Views/Shared/_Layout.cshtml
@@ -1,29 +1,41 @@
 ﻿<!DOCTYPE html>
 <html lang="en">
+
 <head>
     <meta charset="utf-8" />
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1.0, shrink-to-fit=no" />
-    <meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' http://* 'unsafe-inline'; script-src 'self' 'unsafe-inline' http://* 'unsafe-inline' 'unsafe-eval'" />
+    <meta http-equiv="Content-Security-Policy"
+        content="default-src *; style-src 'self' http://* 'unsafe-inline'; script-src 'self' 'unsafe-inline' http://* 'unsafe-inline' 'unsafe-eval'" />
 
     <title>IdentityServer4</title>
 
     <link rel="icon" type="image/x-icon" href="~/favicon.ico" />
     <link rel="shortcut icon" type="image/x-icon" href="~/favicon.ico" />
 
-    <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"
+        integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
     <link rel="stylesheet" href="~/css/site.css" />
 </head>
+
 <body>
     <partial name="_Nav" />
-   
+
     <div class="container body-container">
         @RenderBody()
     </div>
 
-    <script src="~/lib/jquery/dist/jquery.slim.min.js"></script>
-    <script src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
+    <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>
 
     @RenderSection("scripts", required: false)
 </body>
+
 </html>
