Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laminas/laminas-cache-storage-adapter-test ^4.1 -> satisfiable by laminas/laminas-cache-storage-adapter-test[4.1.0]. - laminas/laminas-cache-storage-adapter-test 4.1.0 requires phpunit/phpunit ^10.5 -> found phpunit/phpunit[10.5.0, ..., 10.5.41] but it conflicts with your root composer.json require (^11.0.0). Problem 2 - Root composer.json requires vimeo/psalm ^5.26.1 -> satisfiable by vimeo/psalm[5.26.1]. - phpunit/phpunit[11.5.2, ..., 11.5.3] require phpunit/php-code-coverage ^11.0.8 -> satisfiable by phpunit/php-code-coverage[11.0.8]. - phpunit/phpunit[11.4.2, ..., 11.5.1] require phpunit/php-code-coverage ^11.0.7 -> satisfiable by phpunit/php-code-coverage[11.0.7, 11.0.8]. - phpunit/phpunit[11.3.2, ..., 11.4.1] require phpunit/php-code-coverage ^11.0.6 -> satisfiable by phpunit/php-code-coverage[11.0.6, 11.0.7, 11.0.8]. - phpunit/phpunit[11.2.7, ..., 11.3.1] require phpunit/php-code-coverage ^11.0.5 -> satisfiable by phpunit/php-code-coverage[11.0.5, 11.0.6, 11.0.7, 11.0.8]. - phpunit/phpunit[11.0.0, ..., 11.2.6] require phpunit/php-code-coverage ^11.0 -> satisfiable by phpunit/php-code-coverage[11.0.0, ..., 11.0.8]. - phpunit/php-code-coverage[11.0.7, ..., 11.0.8] require nikic/php-parser ^5.3.1 -> satisfiable by nikic/php-parser[v5.3.1, v5.4.0]. - phpunit/php-code-coverage 11.0.6 requires nikic/php-parser ^5.1.0 -> satisfiable by nikic/php-parser[v5.1.0, ..., v5.4.0]. - phpunit/php-code-coverage[11.0.0, ..., 11.0.5] require nikic/php-parser ^5.0 -> satisfiable by nikic/php-parser[v5.0.0, ..., v5.4.0]. - Conclusion: don't install nikic/php-parser v5.4.0 (conflict analysis result) - Root composer.json requires phpunit/phpunit ^11.0.0 -> satisfiable by phpunit/phpunit[11.0.0, ..., 11.5.3]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.