Alex F

(function ($) {
	$(document).ready(function () {
		document.addEventListener('wpcf7invalid', function (event) {
			$('.wpcf7-form-control').each(function () {
				var $this = $(this);
				var $parent = $this.parent();
				if ($this.hasClass('wpcf7-not-valid')) {
					$parent.addClass('not-valid');
				} else {
					$parent.removeClass('not-valid');
				}
			});
		}, false);
	});
})(jQuery);