I'm building a naga monk (using the statistics from Plane Shift: Amonkhet), and the bite attack states that:
Natural Weapons. Your fanged maw and constricting serpentine body are natural weapons, which you can use to make unarmed strikes. If you hit with your bite, you deal piercing damage equal to 1d4 + your Strength modifier, and your target must make a Constitution saving throw (DC 8 + your proficiency bonus + your Constitution modifier). On a failed save, the target takes 1d4 poison damage. [...]
It makes sense for the piercing damage to scale, and for the bite to become Dex-based. However, I can't find anything that says whether Martial Arts allows the 1d4 poison damage to scale.