How to Upgrade WordPress Automatically
The WordPress Updates page tells you that an updated version of WordPress is available and you have two different ways to update: automatically and manually. To update WordPress automatically, follow these steps:
Back up your WordPress website; do not skip this step!
Backing up your website before updating is an important step, just in case something goes wrong with the upgrade. Give yourself some peace of mind by knowing that you have a full copy of your website that can be restored if needed.
Deactivate all plugins.
This ensures that any plugin conflicts caused by the upgraded version of WordPress cannot affect the upgrade process. It also ensures that your website doesn’t break after the upgrade is completed.
Select all plugins by selecting the box to the left of the Plugin column.
In the drop-down menu at the top, select Deactivate.
Click the Apply button.
Click the Update Now button on the WordPress Updates page.
This reloads the WordPress Updates page.
Wait until your screen redirects to the About WordPress page.
The Welcome to WordPress page loads in your web browser, and you can see that both the update alert message at the top of the site and the notification message on the Dashboard menu isn’t there anymore. The Welcome screen displays a listing of new features in the version you just installed. You’re now using the latest version of WordPress.