testemachine@testemachine-VirtualBox:/var/www/html/skeleton-application$ composer require zendframework/zftool:dev-master ./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) Your requirements could not be resolved to an installable set of packages.
Problem 1 - zendframework/zend-version 2.5.x-dev requires zendframework/zend-json ~2.5 -> satisfiable by zendframework/zend-json[2.5.0, 2.5.1, 2.5.2, 2.6.0, 2.6.1] but these conflict with your requirements or minimum-stability. - zendframework/zend-version dev-master requires zendframework/zend-json ~2.5 -> satisfiable by zendframework/zend-json[2.5.0, 2.5.1, 2.5.2, 2.6.0, 2.6.1] but these conflict with your requirements or minimum-stability.