# Upgrading from 2.0.3 to 2.1.0

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

## Step 1: Update your CodeIgniter files

Replace all files and directories in your “system” folder.

Note

If you have any custom developed files in these folders please make copies of them first.

## Step 2: Replace config/mimes.php

This config file has been updated to contain more user agent types, please copy it to _application/config/mimes.php*.

## Step 3: Update your user guide

Please also replace your local copy of the user guide with the new version.