Restrict characters in password generator

I wish I could restrict the characters used in password generation to avoid ambiguous characters that are difficult to distinguish between in some fonts (ie. o0liIOL1 on US keyboard). And avoid special characters that aren’t available on the US keyboard.

Workaround - keep pressing the regenerate key until a password does not contain ambiguous chars and then add a sprinkling of standard special characters. This takes about 3 mins manually, but could be handled by the password generator in under a second.