Installation request for ghua/ext-direct-bundle v2.4.0 in symfony 3.4.*

[vittore]

composer update with "symfony/symfony": "3.4.*" say

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Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for ghua/ext-direct-bundle v2.4.0 -> satisfiable by ghua/ext-direct-bundle[v2.4.0].
    - ghua/ext-direct-bundle v2.4.0 requires symfony/monolog-bundle ~2.4 -> satisfiable by symfony/monolog-bundle[2.11.0, 2.11.1, 2.11.3, 2.12.0, 2.8.1, 2.x-dev, v2.10.0, v2.11.2, v2.12.1, v2.4.0, v2.4.1, v2.5.0, v2.5.1, v2.6.0, v2.6.1, v2.7.0, v2.7.1, v2.8.0, v2.8.2, v2.9.0] but these conflict with your requirements or minimum-stability.