Tesla has announced its two priciest electric car models will now come with an even longer range. That could help attract new buyers after the company reported a sales slump.

Newly built “Long Range” versions of the Model S sedan and Model X SUV, which both start around $90,000 before savings, will be able to travel 370 miles and 325 miles, respectively, without stopping for a battery charge.

That’s about a 10% boost.

The cars will get some hardware updates that will also improve “acceleration, and ride comfort,” Tesla (TSLA) said in a blog post.

The upgrades could help lure customers to Tesla’s more expensive offerings now that the cheaper Model 3, which starts around $35,000, is on the market, said Karl Brauer, executive publisher at Autotrader and Kelley Blue Book.

“It’s a way to keep those vehicles relevant,” Brauer told CNN Business. “And since the Model S and Model X have been in production longer, they probably have a lot higher profit margins built in” — which means Tesla is probably eager to sell more of them.

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