Error in Providers/Facebook.php on line 34

Hi,

after install the plugin in server production I have the error 500 on web page when I loggin with Facebook and the error in file log is

PHP Parse error: syntax error, unexpected ‘[‘ in /var/www/html/mysite/wp-content/plugins/wordpress-social-login/hybridauth/Hybrid/Providers/Facebook.php on line 34,

I have in server prod the php version 5.3.3 and in development server the version php 5.5.12.

In development server all is ok I don’t have any problem, but in production I have this error

Best regards.