I want to upgrade Kayako Fusion from 4.71.1 to 4.73.3 but..

Hi guys, I am running Kayako Fusion 4.71.1 on Windows 2008 R2 server, PHP 5.6.22, and MySQL 5.1.53 running on the same box. I want to upgrade Kayako Fusion to version 4.73.3 and I am afraid that it will run into the compatibility issue with MySQL 5.1.53. First thing I thought about upgrading MySQL 5.1.53 to 5.7.12 before upgrading Kayako. Is it the right approach? What would be a good recommendation on best practice and upgrade path for MySQL without breaking Kayako? I appreciate any...

I want to upgrade Kayako Fusion from 4.71.1 to 4.73.3 but..