I would also soak it and wash it in HOT water on the heaviest cycle the washer has. By itself, of course. Dry in a HOT dryer. Then wash again with a color catcher. You will know by looking at the color catcher if it is still bleeding.
As we know from our regular laundry, heat sets stains. I find it also helps to set some of this dye.
It can't hurt it.