How can I touch up this slight damage to slipcase during shipping?

I received a book in slipcase in the mail yesterday. There is just a little nudge to the corner of the slip case as you can see in the picture below. I'm looking for advice on how to gently massage this nudge out of the slip case if at all possible. Thank you!

https://drive.google.com/file/d/1sMfoBiUc_UOcK0BvkObtMup1SlVh_Hcw/view?usp=shari...

I have successfully used a bone folder in the past, gently applied, to work out such dings. Some corner bumps are pretty much untreatable, however, and one just learns to live with them. That one looks like it can be mitigated, but I don't think it will ever be eliminated. Bone folders can be obtained from TALAS: https://www.talasonline.com/Bone-Folders

These are useful tools for a collector and I would recommend at least one that is rounded on both ends and one that is pointed. I have both.

I just returned to this thread to explain that I did use my bone folder and an extremely small amount of distilled water to knead out the damaged corner. Not perfect but much better!

>3 RickFlair: Yeah, you won't be able to completely fix it, but any improvement is better than none, right?