Sorry, or as an alternative, just make sure that one of the three bridges given is a port 80 or 443 bridge. Preferably 443.
BridgeDB already does the latter; it tries really hard to make sure that at least one of your bridges is on 443. The only way that you'll get bridges without one of them not being on 443, is if there are no bridges (of the type requested) running on 443.
Trac: Resolution: N/Ato not a bug Status: new to closed