ExpressionEngine® 3 User Guide

Legacy Documentation

You are using the documentation for version 3.5.17. Go here for the latest version or check here for your available upgrades to the latest version.

Updating ExpressionEngine 3

This guide will help you update your site from a previous version of ExpressionEngine 3 to the latest version of ExpressionEngine 3.

See also

If you are upgrading from ExpressionEngine 2 to ExpressionEngine 3, see Upgrading from ExpressionEngine 2.

1. Backup and Prepare

  1. Back-up your ExpressionEngine database and files.
  2. Download the latest release of ExpressionEngine (either ExpressionEngine Core or the standard edition, whichever your site is currently running) and unzip the files to a folder on your computer.

2. Copy Files

Working either locally with your backed up files, or on the server (not recommended), copy the following files from the newly downloaded release to your site:

  1. Copy system/ee/ to system/ee/
  2. Copy themes/ee/ to themes/ee/

3. Run The Update Wizard

Go to your site’s control panel URL (typically found at or and follow the on-screen instructions to update ExpressionEngine.

4. Clean up

You’re Done! ExpressionEngine is now fully updated. But before you go…

  • If the updater could not automatically rename the installer, rename or remove system/ee/installer/ directory manually. The installer directory can be safely removed after installing ExpressionEngine.
  • Review the Version Notes since they outline any version-specific changes that you may need to make to your installation.
  • Review file permissions if something isn’t working quite right.