Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php ~8.4.1 but your php version (8.4.0RC1) does not satisfy that requirement. Problem 2 - Root composer.json requires laminas/laminas-diactoros ^2.26.0 -> satisfiable by laminas/laminas-diactoros[2.26.0]. - laminas/laminas-diactoros 2.26.0 requires php ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 3 - Root composer.json requires phly/keep-a-changelog ^2.13.2 -> satisfiable by phly/keep-a-changelog[2.13.2]. - phly/keep-a-changelog 2.13.2 requires laminas/laminas-diactoros ^3.3 -> found laminas/laminas-diactoros[3.3.0, 3.3.1, 3.4.0, 3.5.0] but it conflicts with your root composer.json require (^2.26.0). Problem 4 - laminas/laminas-diactoros 2.26.0 requires php ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - jwage/changelog-generator 1.4.0 requires laminas/laminas-diactoros ^2.13.0 -> satisfiable by laminas/laminas-diactoros[2.26.0]. - Root composer.json requires jwage/changelog-generator ^1.4.0 -> satisfiable by jwage/changelog-generator[1.4.0]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.