Requirements problem

OK
Web serverApache
OK
PHP5.6.39
OK
PHP register globalsDisabled
OK
PHP extensionsEnabled
OK
Database supportEnabled
OK
PHP memory limit512M
OK
File systemWritable (public download method)
OK
Unicode libraryPHP Mbstring Extension
Error
PHP Max Execution Time30
Your PHP execution time is too low, please set it greater than or equal to 120 seconds.
OK
Settings fileThe ./sites/default/settings.php file exists.
OK
Settings fileThe settings file is writable.
Check the error messages and proceed with the installation.