You can update your email with these simple steps: 

From your desktop or laptop
1. Click on your name in the upper righthand corner (while logged in)
2. Select "Account" from the dropdown menu
3. Click the "Edit Email" link 
4. Enter and confirm your new email address in the appropriate fields, and enter your password
5. Click "Save"

Via mobile web browser
1. Click Edit Email under your email address
2. Enter and confirm your new email address in the appropriate fields, and enter your password
3. Click "Save"
4. You'll receive a confirmation email at the new email address.