U.S. authorities on Thursday expanded slots to seek asylum at land crossings with Mexico through a mobile app for the second time in less than a month, seeking to dispel doubts it isn’t a viable option.

There are now 1,250 appointments at eight land crossings, up from 1,000 previously and 740 in early May.

The increase “reflects our commitment to continue to expand lawful options for migrants,” said Blas Nuñez-Neto, the Homeland Security Department’s assistant secretary for border and immigration policy. “We’ll continue to expand appointments at the border as our operations allow in terms of capacity.”

Nuñez-Neto called CBP One a “safe and orderly option” during a visit to Harlingen, Texas. He announced the expansion a week after Texas sued to end what the state government considers an illegal method of boosting immigration.