Your requirements could not be resolved to an installable set of packages. Problem 1 - roots/wordpress-no-content 6.3.5 requires php >= 7.0.0 -> your php version (5.6.40) does not satisfy that requirement. - roots/wordpress 6.3.5 requires roots/wordpress-no-content 6.3.5 -> satisfiable by roots/wordpress-no-content[6.3.5]. - Root composer.json requires roots/wordpress 6.3.5 -> satisfiable by roots/wordpress[6.3.5]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.