Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires composer/composer dev-main -> satisfiable by composer/composer[dev-main]. - composer/composer dev-main requires composer/pcre ^2.2 || ^3.2 -> satisfiable by composer/pcre[2.2.0, 2.x-dev, 3.2.0, 3.x-dev (alias of dev-main)]. - composer/pcre[2.2.0, ..., 2.x-dev, 3.2.0, ..., 3.x-dev] conflict with phpstan/phpstan <1.11.8. - phpstan/phpstan is locked to version 1.10.47 and an update of this package was not requested. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.