Car seat question

Lucy is getting too tall for her baby car seat. We bought a Graco regular car seat that can be front or rear facing. She loves her new big girl seat. But then she fell asleep and the poor baby was slumped over hanging from the harness.

Is there anything you can do to keep this from happening? We are going to try sticking a rolled up towel under the foot of it to get it to tilt a little more.

ive heard great things about foam pool noodles! lol, cut a piece off and put it under the foot of the seat, just to recline it a bit. never tried it myself as kaydance didnt seem to need it (we waited till she was almost 9 months to put her in a big girl seat though).