Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires bamarni/composer-bin-plugin 0.0.2 (exact version match: 0.0.2 or 0.0.2.0), found bamarni/composer-bin-plugin[v0.0.2] but the package is fixed to 1.8.2 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.