Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires enlightn/security-checker ^1.10 -> satisfiable by enlightn/security-checker[v1.10.0, v1.11.0]. - enlightn/security-checker v1.10.0 requires symfony/yaml ^3.4|^4|^5|^6 -> found symfony/yaml[v3.4.0, ..., v3.4.47, v4.0.0, ..., v4.4.45, v5.0.0, ..., v5.4.53, v6.0.0, ..., v6.4.42] but it conflicts with your root composer.json require (^8.0.0). - enlightn/security-checker v1.11.0 requires symfony/yaml ^3.4|^4|^5|^6|^7 -> found symfony/yaml[v3.4.0, ..., v3.4.47, v4.0.0, ..., v4.4.45, v5.0.0, ..., v5.4.53, v6.0.0, ..., v6.4.42, v7.0.0, ..., v7.4.14] but it conflicts with your root composer.json require (^8.0.0). Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.