Uber customers will eventually be able to use bitcoin to pay for their trips, according to the ride-hailing app’s top boss – though the company is waiting for a couple of improvements before it gives the green light.

The chief executive officer, Dara Khosrowshahi said that In the future Uber will accept cryptocurrencies.

Khosrowshahi cited the cost of exchanges, which can carry high transaction fees, and the environmental impact of digital mining on the energy grid as reasons for why Uber has not yet incorporated the technology.

“We’re having conversations all the time,” Khosrowshahi said. “As the exchange mechanism becomes less expensive and becomes more environmentally friendly, I think you will see us leaning into crypto a little bit more.”