public function update( $new_instance, $old_instance ) {
		$instance                 = $old_instance;
		$instance['title']        = strip_tags( $new_instance['title'] );
		$instance['parent_forum'] = sanitize_text_field( $new_instance['parent_forum'] );

		// Force to any
		if ( ! empty( $instance['parent_forum'] ) && ! is_numeric( $instance['parent_forum'] ) ) {
			$instance['parent_forum'] = 'any';
		}

		return $instance;
	}