spinal hyperextension during squat

any tips for stopping this? I feel like I might be pushing my hips back to far. Also any tips on pronating ankles? I have been doing tons of ankle mobility to no avail. Any tips would be appreciated. Also sorry if you can't tell from the pic. I had no one to film me.

Personally, I think that squat looks about perfect!! I see nothing wrong related to hyperextending your back or pronating your ankles (not really sure I know what you're asking).