Erro ao instalar o twig

(alguém poderia me ajudar...) Quando tento instalar o twig, aparece o seguinte erro:

Using version ^1.0 for symfony/twig-pack
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Restricting packages listed in "symfony/symfony" to "4.2.*"
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for symfony/twig-pack ^1.0 -> satisfiable by symfony/twig-pack[v1.0.0].
    - symfony/twig-pack v1.0.0 requires twig/twig ^2.12|^3.0 -> satisfiable by twig/twig[2.x-dev, 3.x-dev, v2.12.0, v2.12.1, v2.12.2, v2.12.3, v3.0.0, v3.0.0-BETA1, v3.0.1] but these conflict with your requirements or minimum-stability.


Installation failed, reverting ./composer.json to its original content.

obs:tentei com composer require "twig/twig:^1.0" , mas não tive sucesso...