Carriers like UPS and FedEx are upping their prices and imposing new restrictions, and it’s only the beginning of a big change for online retailers.

Both companies have introduced a new $24 fee for packages that exceed 50 pounds, reported the Wall Street Journal. This is both a lowering of the previous 70-pound threshold, as well as a raising of the price. And, as the WSJ wrote, this change would likely impact businesses and individuals who rely on these services to send out heavier items.

This change is all part of an ever-evolving shipping war with Amazon at the center. Amazon has been investing heavily into its own first-party delivery networks in an attempt to be less dependent on third parties like the United States Postal Service, UPS and FedEx. Companies, like FedEx, have broken ties with Amazon, realizing that the e-commerce giant is as much a competitor as it is a business reliant on its services. As a result, the shipping businesses operating outside of the Amazon ecosystem are being forced to rejigger their offerings to increase profits and find new logistical areas to dominate. As this war rages on, those who rely on these services — especially smaller e-commerce businesses — are consistently being bombarded with changes.

Source: How FedEx and UPS’s battle against Amazon is changing online retail | Modern Retail