How To Get a Paper Wrinkle Out of a Card (Topps Heritage)

[canjond]

I have a quick question for the board. I sent a few TTMs out this spring training, and received a pretty cool return from Don Mattingly. The only problem is, Don didn't return the card in the rigid I sent it in, so unfortunately the envelope arrived a little bent and there is now a paper wrinkle in the card right through the signature. The wrinkle did not go through to the back (i.e., it's not a crease). Is there any way to lightly remove the wrinkle? Obviously it's not for resale purposes - just to try to get the visual appearance of the card a bit better.

Thanks!