Changing Innate spells in D&D 5th Ed...

[Urielblue]

Hey there,

I have both the AK, and the D&D 5th HL, and was wondering if it was possible to switch out spells that come as innate racial ones?

I'm using Tiefling for a Feyborn character whose father was a Satyr, not a Fiend;
Wanting to ditch Hellish Rebuke, and Darkness, and replace them with Hideous Laughter, and Moonbeam. At this point, I just cross off/write in changes, but having them all 'official' would be pretty keen.

Any help would be greatly appreciated.

-Uriel