Your requirements could not be resolved to an installable set of packages. Problem 1 - roave/infection-static-analysis-plugin 1.36.0 requires vimeo/psalm ^6.0 -> found vimeo/psalm[6.0.0] but it conflicts with your root composer.json require (^5.26.1). - Root composer.json requires phpunit/phpunit ^11.5.4 -> satisfiable by phpunit/phpunit[11.5.4]. - Root composer.json requires vimeo/psalm ^5.26.1 -> satisfiable by vimeo/psalm[5.26.1]. - infection/infection 0.27.10 requires nikic/php-parser ^4.15.1 -> satisfiable by nikic/php-parser[v4.15.1, ..., v4.19.4]. - You can only install one version of a package, so only one of these can be installed: nikic/php-parser[v4.15.1, ..., v4.19.4, v5.0.0, ..., v5.4.0]. - phpunit/php-code-coverage 11.0.8 requires nikic/php-parser ^5.3.1 -> satisfiable by nikic/php-parser[v5.3.1, v5.4.0]. - roave/infection-static-analysis-plugin 1.35.0 requires infection/infection 0.27.10 -> satisfiable by infection/infection[0.27.10]. - vimeo/psalm 5.26.1 conflicts with nikic/php-parser v4.17.0. - phpunit/phpunit 11.5.4 requires phpunit/php-code-coverage ^11.0.8 -> satisfiable by phpunit/php-code-coverage[11.0.8]. - Root composer.json requires roave/infection-static-analysis-plugin ^1.35.0 -> satisfiable by roave/infection-static-analysis-plugin[1.35.0, 1.36.0]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.