Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires doctrine/doctrine-bundle ^2.13.2 -> satisfiable by doctrine/doctrine-bundle[2.13.2]. - doctrine/doctrine-bundle 2.13.2 requires doctrine/persistence ^2.2 || ^3 -> found doctrine/persistence[2.2.0, ..., 2.5.7, 3.0.0, ..., 3.4.0] but it conflicts with your root composer.json require (^4.0). Problem 2 - Root composer.json requires doctrine/mongodb-odm-bundle ^4.4 || ^5.0 -> satisfiable by doctrine/mongodb-odm-bundle[4.4.0, ..., 4.7.0, 5.0.0, ..., 5.2.0]. - doctrine/mongodb-odm-bundle 4.4.0 requires doctrine/mongodb-odm 2.3.x-dev -> found doctrine/mongodb-odm[2.3.x-dev] but it does not match your minimum-stability. - doctrine/mongodb-odm-bundle[4.4.1, ..., 4.4.3] require doctrine/persistence ^1.3.6|^2.0 -> found doctrine/persistence[1.3.6, 1.3.7, 1.3.8, 2.0.0, ..., 2.5.7] but it conflicts with your root composer.json require (^4.0). - doctrine/mongodb-odm-bundle[4.5.0, ..., 4.5.3] require doctrine/persistence ^2.2|^3.0 -> found doctrine/persistence[2.2.0, ..., 2.5.7, 3.0.0, ..., 3.4.0] but it conflicts with your root composer.json require (^4.0). - doctrine/mongodb-odm-bundle[4.6.0, ..., 4.7.0] require doctrine/persistence ^2.2 || ^3.0 -> found doctrine/persistence[2.2.0, ..., 2.5.7, 3.0.0, ..., 3.4.0] but it conflicts with your root composer.json require (^4.0). - doctrine/mongodb-odm-bundle[5.0.0, ..., 5.2.0] require doctrine/persistence ^3.0 -> found doctrine/persistence[3.0.0, ..., 3.4.0] but it conflicts with your root composer.json require (^4.0).