Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/filesystem ^7.1 -> satisfiable by symfony/filesystem[v7.1.0, v7.1.1, v7.1.2]. - symfony/filesystem[v7.1.0, ..., v7.1.2] require php >=8.2 -> your php version (8.1.29) does not satisfy that requirement. Problem 2 - symfony/filesystem[v7.1.0, ..., v7.1.2] require php >=8.2 -> your php version (8.1.29) does not satisfy that requirement. - vimeo/psalm 5.25.0 requires symfony/filesystem ^5.4 || ^6.0 || ^7.0 -> satisfiable by symfony/filesystem[v7.1.0, v7.1.1, v7.1.2]. - Root composer.json requires vimeo/psalm ^5.25 -> satisfiable by vimeo/psalm[5.25.0]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.