Safari Password Generator Rules Don't Meet Website Criteria

A number of times now, I've run into sites where the the password generated by Safari does not match the sites requirements. Typically, these are the 'must contain a number' or 'must contain a special character' constraint and sometimes length (the generated password is too long). I am trying to use the password generate for all of my accounts. Is there a way to make sure Safari can generate a password that meets the site requirement.