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<h1>Upgrading from 2.1.4 to 2.2.x<a class="headerlink" href="#upgrading-from-2-1-4-to-2-2-x" title="Permalink to this headline"></a></h1>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The <a class="reference internal" href="../libraries/encrypt.html"><span class="doc">Encrypt Class</span></a> now requires the
Mcrypt extension. If you were previously using the Encrypt Class
without Mcrypt, then this is a breaking change. You must install
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installing Mcrypt please see the PHP <cite>documentation
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<p>Before performing an update you should take your site offline by
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<h2>Step 1: Update your CodeIgniter files<a class="headerlink" href="#step-1-update-your-codeigniter-files" title="Permalink to this headline"></a></h2>
<p>Replace all files and directories in your “system” folder.</p>
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