fail installing component on DEFAULT CHARSET=utf8mb4

Warning
JInstaller: :Install: Error SQL Specified key was too long; max key length is 767 bytes
Extension Install: SQL error processing query: DB function failed with error number 1071
Specified key was too long; max key length is 767 bytes
SQL =

CREATE TABLE IF NOT EXISTS `#__securitycheckpro_storage` (
`storage_key` varchar(255) NOT NULL,
`storage_value` longtext NOT NULL,
PRIMARY KEY (`storage_key`)
) ENGINE=InnoDB AUTO_INCREMENT=0 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

everything is ok now thank you for the quick response