For information about how to do this, please see this article.
Being able to automatically update Joomla saves a lot of time and effort.
We recommend to use the Joomla 2.5 for new sites, and migrate older versions to Joomla 2.5 if possible. And to be able to use the latest 3rd party extensions.
So make sure you check now and then for new Joomla versions, and upgrade your Joomla whenever there is a new version available that is said to deal with security vulnerabilities.When you use the Update link in the Jomres control panel you will be sent to the Joomla Extensions Update page. Click on the checkbox next to Jomres and click Update.When you click on this button Joomla will install the webinstaller which will then be loaded, from there you can complete the upgrade by following the onscreen instructions.This is a guide how to upgrade Joomla to a newer version. First and foremost, because you want your Joomla website to be secure.All dynamic websites are more or less vulnerable to attacks by hackers, who might want to add spam to your website, damage it, or get inside to steal user information.