If you pay for your digital subscription with one of our payment partners (Apple Pay, Android Pay, PayPal), you can always update your payment method to credit card.
To update your payment method to credit card, go to your My Post account and click on the "Subscription & Billing" tab. Click on the "Manage" button. Underneath your subscription information, you will see "Payment Method." Click the "Change to credit card" link and enter your valid credit card information to update your payment method.