Your lock file does not contain a compatible set of packages. Please run composer update. Problem 1 - phpstan/phpstan-deprecation-rules is locked to version 1.2.0 and an update of this package was not requested. - phpstan/phpstan-deprecation-rules 1.2.0 requires phpstan/phpstan ^1.11 -> could not be found in any version, there may be a typo in the package name. Problem 2 - phpstan/phpstan-nette is locked to version 1.3.8 and an update of this package was not requested. - phpstan/phpstan-nette 1.3.8 requires phpstan/phpstan ^1.11.11 -> could not be found in any version, there may be a typo in the package name. Problem 3 - phpstan/phpstan-phpunit is locked to version 1.4.0 and an update of this package was not requested. - phpstan/phpstan-phpunit 1.4.0 requires phpstan/phpstan ^1.11 -> could not be found in any version, there may be a typo in the package name. Problem 4 - phpstan/phpstan-strict-rules is locked to version 1.6.0 and an update of this package was not requested. - phpstan/phpstan-strict-rules 1.6.0 requires phpstan/phpstan ^1.11 -> could not be found in any version, there may be a typo in the package name. Potential causes: - A typo in the package name - The package is not available in a stable-enough version according to your minimum-stability setting see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details. - It's a private package and you forgot to add a custom repository to find it Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.