When I check my Google PageSpeed Insights of my wordpress

When I check my Google PageSpeed Insights of my wordpress site, I got "Eliminate render-blocking JavaScript and CSS in above-the-fold content" for the google font script.

Autoptimize has been install my internal css files have been combined and deferred after fold.

In the theme's function.php,

//* Enqueue Scripts
add_action( 'wp_enqueue_scripts', 'centric_load_scripts' );
function centric_load_scripts() {
	wp_enqueue_style( 'google-fonts', '//fonts.googleapis.com/css?family=Lato:300,700|Spinnaker', array(), CHILD_THEME_VERSION );
}

How to defer or asynchronously load the google font css?

Thanks!