Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires spryker-sdk/integrator dev-master as 1.0.0 -> satisfiable by spryker-sdk/integrator[dev-master]. - spryker-sdk/integrator dev-master requires spryker-sdk/utils ^0.1.1 -> found spryker-sdk/utils[0.1.1] but it conflicts with your root composer.json require (dev-master). Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.