how to upgrade from 3.0.XX to 4.0 lts on debian 7

[tnt2]

hi,
i have 3.0.27 on debian7
now i want upgrade to 4.0 lts, but zabbix 4.0lts package is not for debian 7. (only for debian 8 and 9)
what is the correct procedure to upgrade 4.0?

can i use this scenario? :
1. disable start zabbix after reboot
2. upgrade debia7 to debian8
3. reboot (zabbix dont start)
4. upgrade zabbix 3.0.27 to 4.0lts
5. start zabbix server

(zabbix is in virtual pc, i have backup)

thanks