command is giving error

[flik]

sudo php artisan migrate:install
PHP Parse error: syntax error, unexpected 'yield' (T_YIELD), expecting '(' in /home/flik/www/Laravel/laravel/helpers.php on line 536
PHP Stack trace:
PHP 1. {main}() /home/flik/www/Laravel/artisan:0
PHP 2. require() /home/flik/www/Laravel/artisan:19