Amazon revealed this morning that it's raising its free shipping minimum to $49 for non-Prime members. That's a $14 bump up from the previous minimum of $35 it set when it last raised prices in 2013. Customers looking to buy $25 worth of books will still get free shipping, though.

As usual, Amazon hasn't revealed details as to why the price for shipping is being raised, but the reason why could be that, with its Prime service only growing, the retail giant is keen on pushing more of its customers into a $99 yearly subscription. What's more, Amazon's financials suffered last quarter mainly due to shipping and delivery costs. Hiking prices could potentially pull in more money, but it'll be some time before we learn if the increase does the trick.