I am setting up a page for selling items using Pay Pal's "add to cart" buttons. I am trying to customize the payment page by adding a logo and page colors to give the look and feel of the rest of my site. However, I have been prompted to provide an image URL that is stored on a secure (https) server. See below.
"We recommend providing an image URL that's stored on a secure (https) server. Otherwise, your customer's web browser might show a message that says the payment page contains nonsecure items."
Is this something that is automatically available with LP, or do I have to do something to make my site more secure? How do I go about this? 
