## Upgrade on CentOS Upgrade on CentOS — How to upgrade milter manager on CentOS |

## About this document

This document describes how to upgrade milter manager on CentOS. See Install to CentOS for newly install information.

## Upgrade

If we are using 1.8.1 or earlier, we need to install milter-manager-release at first. If we are using 1.8.2 or later, we doesn't need to this operation.

We need to disable GPG key check because the new repository uses a new GPG key and a new GPG key is included in the package.

    % sudo yum install --nogpgcheck -y milter-manager-release

We just upgrade milter manager package.

    % sudo yum update -y milter-manager

## Conclusion

milter manager can be upgraded easily. It means that milter manager is a low maintenance cost software.

If we want to use improvements in a new version, please upgrade your milter manager.

If we've also installed optional packages, we will go to Upgrade on CentOS (optional) .