You may do so by following these instructions:

• Press the Home button on your Roku remote.
• Select Settings.
• Select Payment method and continue to one of two options. Update payment method. Update your existing credit card information, such as expiration date.
• Add payment method. Add a new credit card to your Roku account.
• Enter your payment information in each field as it appears on your credit card.
• Select Save card.

If you need any additional information, please contact Roku directly.