# Upgrading from 3.0.0 to 3.0.1

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/ directory.

Note

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

## Step 2: Update your CLI error templates

Replace all files under your application/errors/cli/ directory.