Debian 8 -> Mysql 5.5.62 to 5.7

[Koloses]

Hello,
How I can upgrade mysql 5.5.62 to 5.7 on debian 8?
Could someone show me step by step how to upgrade it?

[Koloses]

When I upgraded mysql to 5.7, I find new error

Your privilege table structure seems to be older than this MySQL version!
Please run the mysql_upgrade command(mysql_fix_privilege_tables on older systems) that should be included in your MySQL server distribution to solve this problem!

I run "mysql_upgrade --force"

Upgrade process completed successfully.
Checking if update is needed.

but i have the same problem

I have this problem when I check "Users" in phpmyadmin