If you need to make a change to your credit card information, you can do this directly from the web app as long as you are an Admin for the account.
1. Navigate to the Billing page by hovering over the profile picture in the top right > Company Settings > Billing.
2. From there, select 'Edit credit card'.
3. Enter in the new credit card information. Click Save when finished.
4. Your new credit card information is now on file, and the next payment will now be billed to this new card.