Yes. You really do have to update WordPress.
WordPress is an open-source publishing platform that is continuously being updated and enhanced by a large team of developers. Whenever a new WordPress version is released, we strongly recommend updating to keep your site running at the top of its game. Plus, running the latest version of WordPress is one of the best ways to prevent your site from being the target of a hack.
The updating process is simple and painless. Just click the upgrade link in the notice bar at the top of your WordPress admin screen and then click on the blue Update Now button. You don’t need to worry about downloading WordPress or making a backup of your database, as our servers do this for you automatically. And if you have any problems with the upgrade, the SNO Support team is always here to help you out.