The US Postal Service is asking for an increase in the price of stamps.

It would be the biggest price jump on stamps in its history. Wednesday the Postal Service proposed and increase in stamps from 50 cents to 55 cents, the biggest hike since 1991.

Prices for packages, however, can float with market rates. The USPS wants to boost Priority Mail prices by an average of 5.9%. A small flat-rate box that costs $7.20 to ship, for example, would next year cost $7.90.

In addition, according to cnn.com, the US Postal service wants to charge Amazon and other like it more for package deliveries.