Wedding dress turned yellow from dry-cleaning can it be fixed?

My wedding dress was made by a designer, its silk and tulle with beaded lace on top. I took it to get dry cleaned by a bridal dry cleaner 2 days after wearing it. I just went to pick it up today and the white silk has become a yellow/ivory, however it is only the exposed areas, the folded material is still white. Can anything be done to make it white again?