Change minimum age requirement

I deal with teens and need to change the minimum age requirements. Any ideas? Thanks.

Goto advanced settings and change it. You may also need to change it in the table profile fields to accept that age range.

I'm needing to do this as well, I've changed it in the advanced settings and it still doesnt let them if they're under 18. And I've been looking through the table and I can't find anything relating to that.

Go to admin - builders - Field builders 
go there to join form  choose day of birth, go to advanged tab and setup there also.

save this..

Thanks!