Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/process ^5.4 -> satisfiable by symfony/process[v5.4.0-BETA1, ..., 5.4.x-dev]. - symfony/process[v5.4.0-BETA1, ..., 5.4.x-dev] require php >=7.2.5 -> your php version (7.0.33) does not satisfy that requirement. Problem 2 - Root composer.json requires symfony/finder ^5.4 -> satisfiable by symfony/finder[v5.4.0-BETA1, ..., 5.4.x-dev]. - symfony/finder[v5.4.0-BETA1, ..., 5.4.x-dev] require php >=7.2.5 -> your php version (7.0.33) does not satisfy that requirement. Problem 3 - Root composer.json requires symfony/filesystem ^5.4 -> satisfiable by symfony/filesystem[v5.4.0-BETA1, ..., 5.4.x-dev]. - symfony/filesystem[v5.4.0-BETA1, ..., 5.4.x-dev] require php >=7.2.5 -> your php version (7.0.33) does not satisfy that requirement. Problem 4 - Root composer.json requires phpstan/phpstan ^1.10.0 -> satisfiable by phpstan/phpstan[1.10.0, ..., 1.11.x-dev]. - phpstan/phpstan[1.10.0, ..., 1.11.x-dev] require php ^7.2|^8.0 -> your php version (7.0.33) does not satisfy that requirement. Problem 5 - symfony/console[v5.4.0-BETA1, ..., 5.4.x-dev] require php >=7.2.5 -> your php version (7.0.33) does not satisfy that requirement. - Root composer.json requires symfony/console ^5.4 -> satisfiable by symfony/console[v5.4.0-BETA1, ..., 5.4.x-dev].