What do you want to do? Increase the peak, make the muscle longer?
You can do all the exercises you like, hell, you can even listen to squatologists when they say; "squats will biuld biceps" if you've been training hard now and for some time and your guns havnt changed, nothing else will.
Grab a bar and curl it, work it as hard and as intense as any other exercise you do, there is no secret, the overall volume or circumfrence of the muscle will change, that is all.