Bent Gasket on a Chest Freezer?

I recently purchased a pre-owned chest freezer that is like new and freezes well. However, the owner had propped the lid open to prevent mildew and now the gasket/seal is bent in that place. I tested the seal by closing the lid on a sheet of paper and the gasket holds it tight, except in that spot. Since this is not a frost-free freezer, I'd like to ensure a tight seal. Is there anything I can do to fix this, without having to replace the entire gasket?

By Moogies from Double Oak, TX