Under CentOS, installed packages can be updated to their most current version via the "yum" command using the "update" option for that. For instance, the following can be used replacing PACKAGE with the official name of the package to update:
sudo yum update PACKAGE
If there is a new version available, a report showing the new version to be installed, any dependency updates and the amount of disk space used will be displayed. Enter 'y' at the prompt to confirm the update.
The new software will be installed. That can take a few minutes depending upon the software selected.
The full usage of the yum command can be viewed at: