Support for user with latest version when I got version 9

Hi!

I'm stuck with an old Mac that's got Mac OS 10.9.5, and I'm not able to upgrade to a newer OS at the moment.

I'm trying to help a colleague who's got the latest version of OS and Teamviewer.. Is there any way I can connect to his Mac and Teamviewer with my old version (Teamviewer version 9).

Really appreciate any help or suggestions.

Thank you! 
Hannah