# Problems installing amazon-mailer (or composer update)

**URL:** <https://forum.mautic.org/t/problems-installing-amazon-mailer-or-composer-update/30934>\
**Category:** Product Support\
**Created:** [February 18, 2024, 8:28am UTC](https://forum.mautic.org/t/problems-installing-amazon-mailer-or-composer-update/30934 "2024-02-18T08:28:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ottenjeffrey](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/ottenjeffrey/32/636_2.png) [@ottenjeffrey](https://forum.mautic.org/u/ottenjeffrey)\
**Post date:** [February 18, 2024, 8:28am UTC](https://forum.mautic.org/t/problems-installing-amazon-mailer-or-composer-update/30934/1 "2024-02-18T08:28:31Z")

</div>

**Your software**  
My Mautic version is: v5.0.3  
My PHP version is: PHP Version 8.0.26  
My Database type and version is:

**Your problem**  
My problem is: I want to install amazon-mailer using composer require symfony/amazon-mailer But I get the following error:

Your requirements could not be resolved to an installable set of packages

Problem 1  
- mautic/core-lib[5.0.0, …, 5.0.3] require friendsofsymfony/oauth-server-bundle dev-upgrade-2 → found friendsofsymfony/oauth-server-bundle[dev-upgrade-2] but it does not match your minimum-stability.  
- Root composer.json requires mautic/core-lib ^5.0 → satisfiable by mautic/core-lib[5.0.0, 5.0.1, 5.0.2, 5.0.3].

You can also try re-running composer require with an explicit version constraint, e.g. “composer require symfony/amazon-mailer:\*” to figure out if any version is installable, or “composer require symfony/amazon-mailer:^2.1” if you know which you need.

When I use “composer update” I got the same result

Loading composer repositories with package information  
Updating dependencies  
Your requirements could not be resolved to an installable set of packages.

Problem 1  
- mautic/core-lib[5.0.0, …, 5.0.3] require friendsofsymfony/oauth-server-bundle dev-upgrade-2 → found friendsofsymfony/oauth-server-bundle[dev-upgrade-2] but it does not match your minimum-stability.  
- Root composer.json requires mautic/core-lib ^5.0 → satisfiable by mautic/core-lib[5.0.0, 5.0.1, 5.0.2, 5.0.3].