# Installing Mautic Composer Dependency Issue

**URL:** https://forum.mautic.org/t/installing-mautic-composer-dependency-issue/22896
**Category:** Product Support
**Created:** [March 2, 2022, 6:39pm UTC](https://forum.mautic.org/t/installing-mautic-composer-dependency-issue/22896 "2022-03-02T18:39:54Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![mikew](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/mikew/32/5156_2.png) [@mikew](https://forum.mautic.org/u/mikew)
#### Post date: [March 2, 2022, 6:39pm UTC](https://forum.mautic.org/t/installing-mautic-composer-dependency-issue/22896/1 "2022-03-02T18:39:55Z")

</div>

I have always ever installed Mautic with a zip file on ubuntu servers.

After reading today about Mautic 5 I decided to go ahead and give composer a try.

I get the following error:

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

  Problem 1
    - bandwidth-throttle/token-bucket 2.0.0 requires ext-bcmath * -> it is missing from your system. Install or enable PHP's bcmath extension.
    - mautic/core-lib 4.2.0 requires bandwidth-throttle/token-bucket ^2.0 -> satisfiable by bandwidth-throttle/token-bucket[2.0.0].
    - Root composer.json requires mautic/core-lib 4.2.0 -> satisfiable by mautic/core-lib[4.2.0].

```

I have tried to install bcmath again yet this does not work. I have searched the net to try and trouble shoot it but cannot find the solution.

My distribution of ubuntu is:

| Distributor ID: | Ubuntu |
| --- | --- |
| Description: | Ubuntu 21.04 |
| Release: | 21.04 |
| Codename: | hirsute |

I have tried apt install php7.4-bcmath  
composer require bandwidth-throttle/token-bucket

Nothing working. Any one know how I can go ahead and fix this ?