Graphic bounding box much bigger than actual symbol

For some reason, my graphic symbols' bounding box dimensions are much larger than what their actual dimensions entail. I wouldn't worry too mch about this normally, but I'm trying to export the parent symbol as a spritesheet and those dimensions are also changing the size of the final sprite, which is making the png file a lot larger than needed.

If theres a way to reset the box, please let me know.
