.. index::
single: Upgrading; Patch Version
When a new patch version is released (only the last number changed), it is a release that only contains bug fixes. This means that upgrading to a new patch version is really easy:
$ composer update symfony/symfony
That's it! You should not encounter any backwards-compatibility breaks or
need to change anything else in your code. That's because when you started
your project, your composer.json included Symfony using a constraint
like 2.6.*, where only the last version number will change when you
update.
Tip
It is recommended to update to a new patch version as soon as possible, as important bugs and security leaks may be fixed in these new releases.