Bah humbug.

Low-fare carrier Spirit Airlines has announced that it will raise checked baggage fees by $2 for tickets booked over the holiday travel season.

The surcharge is in effect from Dec. 18 through Jan. 5 -- some of the busiest travel weeks of the year.

The Temporary Holiday Bag Price change was announced on the airline’s website. “To make sure we have enough room for everyone’s bags this season, we’re encouraging customers to pack a bit lighter,” read an announcement.

Spirit Airlines already charges more fees than any other domestic carrier and charges extra for things including boarding passes printed at the airport, carry-on bags and drinks during the flight.

Spirit CEO Ben Baldanza has repeatedly explained that add-on fees are what enables to carrier to offer its low airfares.

Meanwhile, Spirit  has planned to pain its fleet of 61 planes a bold yellow hue, reports the LA Times. Seven planes are currently getting the brighter treatment, with plans to redo the entire fleet over the next three years.