When your credit card is expired (or will be) and the security deposit needs to be reserved, you can do either of 2 things:
1. Just wait. When we will try to reserve the deposit on the expired card, it will fail. When it does, you will receive an email with a link to make the deposit manually.
2. You can navigate to your booking overview a few days before check-in and scroll to the bottom and press the yellow "Reserve security deposit" button to set the deposit manually.