diff --git a/demo/Web.config b/demo/Web.config
deleted file mode 100644
index b75f9ff1..00000000
--- a/demo/Web.config
+++ /dev/null
@@ -1,24 +0,0 @@
-﻿<?xml version="1.0"?>
-<configuration>
-  <!-- Standard ASP.NET configuration; see https://go.microsoft.com/fwlink/?LinkId=169433 -->
-  <system.web>
-    <compilation debug="false" targetFramework="4.0"/>
-  </system.web>
-
-  <!-- Register MIME type for cache manifest -->
-  <system.webServer>
-    <staticContent>
-      <remove fileExtension=".appcache"/>
-      <mimeMap fileExtension=".appcache" mimeType="text/cache-manifest"/>
-    </staticContent>
-  </system.webServer>
-
-  <!-- Disable caching for cache manifest file -->
-  <location path="offline.appcache">
-    <system.webServer>
-      <staticContent>
-        <clientCache cacheControlMode="DisableCache"/>
-      </staticContent>
-    </system.webServer>
-  </location>
-</configuration>
diff --git a/demo/default.htm b/demo/default.htm
index 83474f1e..44d8c33d 100644
--- a/demo/default.htm
+++ b/demo/default.htm
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml" manifest="offline.appcache">
+<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
   <meta charset="utf-8"/>
   <link href="default.css" rel="stylesheet" type="text/css"/>
@@ -30,7 +30,7 @@
       <div class="flex-fill"></div>
       <footer><a href="#" id="copyLink">Copy Link</a></footer>
       <div class="flex-fill"></div>
-      <footer>Copyright &copy; 2015-2019 by <a href="https://dlaa.me/">David Anson</a></footer>
+      <footer>Copyright &copy; 2015-2020 by <a href="https://dlaa.me/">David Anson</a></footer>
     </div>
   </div>
   <script src="markdown-it.min.js"></script>
diff --git a/demo/offline.appcache b/demo/offline.appcache
deleted file mode 100644
index c195b570..00000000
--- a/demo/offline.appcache
+++ /dev/null
@@ -1,10 +0,0 @@
-CACHE MANIFEST
-# 2019-12-14
-default.css
-default.htm
-default.js
-favicon.ico
-markdown-it.min.js
-markdownlint-browser.min.js
-NETWORK:
-*
diff --git a/helpers/LICENSE b/helpers/LICENSE
index 6dc2f7d8..85b80c27 100644
--- a/helpers/LICENSE
+++ b/helpers/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015-2019 David Anson
+Copyright (c) 2015-2020 David Anson
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
