1) Sign into your account here.
2) If you have multiple subscriptions, click on the "Meal Planner" in the upper left-hand corner and make sure you select the correct subscription.
3) Click on the link that says "Subscription Settings" on the left underneath the list of your recent weekly orders.
4) Click on the "Change" button next to where it says "Payment Method."
5) In the resulting pop-up window, you can either click "New Payment Method" to add a new credit card to your subscription or else click "Select" next to another payment method you previously entered into the system.
6) If you choose to enter a new credit card number, simply fill out the information in the pop-up window and click "Save."