Newest Version of Python

Just updated my HA to 0.102.3. The notification tells me “Python 3.6 support is deprecated and will be removed in the first release after December 15, 2019. Please upgrade Python to 3.7.0 or higher.”

I’ve tried to update Python, but my Mint install tells me “python3 is already the newest version (3.6.7-1~18.04).”

I know that Python 3.7 and 3.8 both exist. Is it simply that the distributions haven’t been created yet?

I’m stunned no-one has responded. Not even to tell me I’m being stupid.
I didn’t realise I have to give a version umber when doing the update.
[SOLVED]