How to load font awesome from CDN

Hi

How can I load font awesome from a CDN?

I have tried a solution from Tom in another thread, but it is not working. It still loads the font-awesome from my own site.

This is the code that does not work:

add_action( 'wp_enqueue_scripts', 'generate_custom_scripts', 10 );
function generate_custom_scripts() {
      wp_dequeue_style( 'fontawesome' );
      wp_enqueue_style( 'fontawesome-cdn', '//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css', false, '4.3.0', 'all' );
}