Then put your bass on the dining room table with the endpin against your chest, your fingers on the arch of the bridge and pull the top of the bridge gently but firmly back toward you. Repeat as necessary.
Don't overdo it or the 275 LBS of string pressure will slam the bridge into the top (and maybe your fingers!) with a mighty whack.
"Don't try this at home, professional luthier on closed table, YMMV, etcetera"