Class 'Mpociot\BotMan\BotManServiceProvider' not found

[joaogabriel97]

Hello, i'm trying to use Botman in my laravel project, but don't work.
I put the:
Mpociot\BotMan\BotManServiceProvider::class on app.php
and 'BotMan' => Mpociot\BotMan\Facades\BotMan::class on alias
And still the same message error: Class 'Mpociot\BotMan\BotManServiceProvider' not found.

[fs-kamrul1]

you are solve this problem

[ImMrDimm]

not solved for existing project