public function tec_compatibility_notice() {
		$active_plugins = get_option( 'active_plugins' );

		$plugin_short_path = null;

		foreach ( $active_plugins as $plugin ) {
			if ( false !== strstr( $plugin, 'the-events-calendar.php' ) ) {
				$plugin_short_path = $plugin;
				break;
			}
		}

		$upgrade_path = wp_nonce_url(
			add_query_arg(
				array(
					'action' => 'upgrade-plugin',
					'plugin' => $plugin_short_path,
				), get_admin_url() . 'update.php'
			), 'upgrade-plugin_' . $plugin_short_path
		);

		$output = '<div class="error">';
		$output .= '<p>' . sprintf( __( 'When The Events Calendar and Event Tickets are both activated, The Events Calendar must be running version %1$s or greater. Please %2$supdate now.%3$s', 'event-tickets' ), $this->min_tec_version, '<a href="' . esc_url( $upgrade_path ) . '">', '</a>' ) . '</p>';
		$output .= '</div>';

		echo $output;
	}