When a new version of WordPress is available you will receive an update message in your WordPress Admin area. To update WordPress, click the link in the message. It should say “please update now”. You will be directed to the next page where you can choose to either update automatically or manually. Make sure upgrade automatically as its safer and easier.
Click on “update now” to update your WordPress.
Note: Before updating WordPress, make sure you backup your WordPress in case something goes wrong.