To start the Ratchet server for local testing, do this: cd C:\MAMP\htdocs\final php bin/ratchetServer.php This should start a WebSocket server at localhost port 8080. To update Composer dependencies on Windows: cd C:\MAMP\htdocs\final php C:\ProgramData\ComposerSetup\bin\composer.phar update If you're on the lakeside server, you need to specify the path to the Phar class: php -d extension=phar.so ~/composer.phar update