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<td><h1>CodeIgniter User Guide Version 1.7.2</h1></td>
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<a href="http://codeigniter.com/">CodeIgniter Home</a> &nbsp;&#8250;&nbsp;
<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
Upgrading from 1.5.3 to 1.5.4
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<h1>Upgrading from 1.5.3 to 1.5.4</h1>

<p>Before performing an update you should take your site offline by replacing the index.php file with a static one.</p>



<h2>Step 1: Update your CodeIgniter files</h2>

<p>Replace these files and directories in your "system" folder with the new versions:</p>

<ul>

<li><dfn>system/application/config/mimes.php</dfn></li>
<li><dfn>system/codeigniter</dfn></li>
<li><dfn>system/database</dfn></li>
<li><dfn>system/helpers</dfn></li>
<li><dfn>system/libraries</dfn></li>
<li><dfn>system/plugins</dfn></li>
</ul>

<p class="important"><strong>Note:</strong> If you have any custom developed files in these folders please make copies of them first.</p>

<h2>Step 2: Add charset to your config.php </h2>
<p>Add the following to system/application/config/config.php</p>
<code>/*<br />
	|--------------------------------------------------------------------------<br />
	| Default Character Set<br />
	|--------------------------------------------------------------------------<br />
	|<br />
	| This determines which character set is used by default in various methods<br />
	| that require a character set to be provided.<br />
	|<br />
	*/<br />
	$config['charset'] = &quot;UTF-8&quot;;</code>

<h2>Step 3: Autoloading language files </h2>
<p>If you want to autoload any language files, add this line to system/application/config/autoload.php</p>
<code>$autoload['language'] = array();</code>

<h2>Step 4: Update your user guide</h2>
<p>Please also replace your local copy of the user guide with the new version.</p>

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