If you hoped the price of Tesla’s Full Self Driving (Supervised) subscription would remain at $99, well, sorry. Less than 10 days after saying owners won’t be able to outright buy FSD and new owners will need to subscribe to it, Tesla CEO Elon Musk has admitted the $99 per month price tag will not remain static. While he didn’t specify how much the price will rise or how often, Musk still claims there will be “a massive value jump” when new features are introduced.

While you can purchase FSD outright for $8,000, the deadline to make that purchase on a new Tesla is approaching. After February 14, the only way to get Tesla’s automated driving software will be a monthly subscription that will start at $99. While Musk didn’t say the monthly fee will increase, a response to Sawyer Merritt on Twitter confirms the cost of FSD’s monthly subscription will rise “as FSD’s capabilities improve.”

Musk didn’t clarify in the post just how often those capabilities will “improve,” what counts as an improvement worth increasing the price for, and how much those improvements will affect the price. The middle concern might have been sort of answered as Musk mentioned there will be a “massive value jump” when FSD goes unsupervised and you’re allowed to talk on your phone or sleep while the car drives itself.

While it is a (mostly) good system right now, we hope this is an indication the coming improvements are truly worth the price increases Musk predicts. Because, otherwise, he will have found his “infinite money glitch” by making you subscribe to an FSD package that will rise in costs for lackluster or basic updates.