# Composer When the `composer.json` file has changed, the new file should be checked for issues. This task will execute [`composer validate`](https://getcomposer.org/doc/03-cli.md#validate) to make sure that everything is OK. The configuration looks like: ```yaml # grumphp.yml grumphp: tasks: composer: file: ./composer.json no_check_all: false no_check_lock: false no_check_publish: false no_local_repository: false with_dependencies: false strict: false ``` **file** *Default: ./composer.json* Specifies at which location the `composer.json` file can be found. **no_check_all** *Default: false* Do not emit a warning if requirements in composer.json use unbound version constraints. **no_check_lock** *Default: false* Do not emit an error if composer.lock exists and is not up to date. **no_check_publish** *Default: false* Do not emit an error if composer.json is unsuitable for publishing as a package on Packagist but is otherwise valid. **no_local_repository** *Default: false* Do emit an error if composer.json declares local repositories (see https://getcomposer.org/doc/05-repositories.md#path). **with_dependencies** *Default: false* Also validate the `composer.json` of all installed dependencies. **strict** *Default: false* Return a non-zero exit code for warnings as well as errors.