public static function install() {

		global $wp_roles;

		if ( ! class_exists( 'WP_Roles' ) ) {
			return;
		}

		$roles                  = self::get_roles();
		$roles['administrator'] = __( 'Administrator', 'lifterlms' );

		$wp_roles = wp_roles();

		foreach ( $roles as $role => $name ) {

			$role_obj = $wp_roles->get_role( $role );

			if ( ! $role_obj ) {
				$role_obj = $wp_roles->add_role( $role, $name );
			}

			self::update_caps( $role_obj, 'add' );

		}

	}