title: NodeJS server throws "Updgrade Required" on loading pages even after being updated to latest npm version
body: <p>I have a node project developed with NodeJS version 5.4.x and NPM version with 3.3.12 on windows. When i tried to run the project after a Quite sometime now it throws "Upgrade Required" on page loaded(HTTP Error code - 426).</p>
  
  <p>Then I have installed NodeJs with 5.5 Stable. And ran couple of commands like </p>
  
  <pre><code>&gt; npm install npm -g
  &gt; npm cache clean -f
  &gt; npm update -g
  </code></pre>
  
  <p>And Npm version is upgraded to 3.5.3. And i ran the node js project on eclipse but still the issue persist. Need help. Thanks</p>