My boule deforms while baking

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My round boule does not stay round. Comes out in funky shapes. What could I be doing wrong?

I did cut into the loaf and the bread was amazing. Just the way I like it!  Had a slightly tough, yet crusty crust and had a very soft inside. I loved it.

 

Boule.jpg

Are you scoring the bread before you bake it?  Scoring with a razor or a sharp knife is essential to ensure that the bread rises uniformly. Scoring looks nice too, but that's not it's primary function.

Also, make sure that when you form the boule, you create uniform tension on the surfact of the dough.  This tension is important to make sure the bread hold its shape as it bakes.