Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires roave/infection-static-analysis-plugin ^1.35 -> satisfiable by roave/infection-static-analysis-plugin[1.35.0, 1.36.0]. - roave/infection-static-analysis-plugin 1.35.0 requires vimeo/psalm ^4.30.0 || ^5.15 -> found vimeo/psalm[4.30.0, 5.15.0, ..., 5.26.1] but it conflicts with your root composer.json require (^6). - roave/infection-static-analysis-plugin 1.36.0 requires php ~8.2.0 || ~8.3.0 || ~8.4.0 -> your php version (8.1.31) does not satisfy that requirement.