Ankle Flexibility

I have a hard time keeping a vertical torso when deep squatting and think that ankle flexibility may have something to do with it.

Any suggestions on how I can fix this problem?

Drills? Exercises? Stretches?

Thanks

I’ve been working on this as well. Stretch your achilles tendons and calves. Also, try wall squats: with your back against a wall and feet slightly away from the wall, squat down as deep as you can, focusing on “pushing” your knees forward. When you can do a full squat with your feet at a certain distance from the wall, try moving them back towards your hips.