# Upgrading from 1.5.4 to 1.6.0

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 these files and directories in your “system” folder with the new versions:

- system/codeigniter
- system/database
- system/helpers
- system/libraries
- system/plugins
- system/language

Note

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

## Step 2: Add time_to_update to your config.php

Add the following to application/config/config.php with the other session configuration options

    $config['sess_time_to_update']         = 300;

## Step 3: Add $autoload[‘model’]

Add the following to application/config/autoload.php

    /*
    | -------------------------------------------------------------------
    | Auto-load Model files
    | -------------------------------------------------------------------
    | Prototype:
    |
    | $autoload['model'] = array('my_model');
    |
    */

    $autoload['model'] = array();

## Step 4: Add to your database.php

Make the following changes to your application/config/database.php file:

Add the following variable above the database configuration options, with $active_group

    $active_record = TRUE;

Remove the following from your database configuration options

    $db['default']['active_r'] = TRUE;

Add the following to your database configuration options

    $db['default']['char_set'] = "utf8";
    $db['default']['dbcollat'] = "utf8_general_ci";

## Step 5: Update your user guide

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