You can update your account's payment method at any time. The next charge will use the new method.
Click "Add method" (if you don't have one) or "Change" (if you want to replace the current one).
Enter the card details: number, expiration date, and security code. Visa, Mastercard, and Amex are accepted. [verify accepted payment methods; bank transfer available for Enterprise only]
Confirm. The next charge will be applied to the new method.