No biggie – just follow these quick steps to set a new one:

Step 1: Log In to your account
Step 2: Click on the My Account icon 
Step 3: Head to Security
Step 4: Scroll to the Change PIN section

Step 5: Enter your current password, then your new PIN, and re-type it to confirm 
Step 6: Hit Update PIN

And that's it - your new PIN is set and you're good to go!