It seems as though Apple is prepping to unveil a new version of the Macbook Air at next month’s WWDC. This conclusions comes after almost every major store is reporting that they no longer have any stock of the 13-inch default high-end Air that comes with a 1.8GHz processor and 256GB of flash storage.

One of the most telling signs of an upcoming new Apple product revision is when the current stock for that product starts drying up at stores. Apple always chooses to stop shipping and producing its old computers to ramp up production of their new model and to free up space at retail stores for the new device in the weeks leading up to its release.

AppleInsider reports that the Air is currently sold out at Amazon, B&H, MacConnection, MacMall, and J&R. The only Apple reseller they found that was actually still selling the device was Best Buy.

Rumors have been circling for some time that a new Macbook Air would be unveiled at WWDC and that it would include Intel’s new Haswell processor. The Haswell processors are set to launch in a couple of weeks, so the timing works out perfectly.

Long story short, if you’re thinking about getting a Macbook Air, you should probably wait a month.