The Cuban government has loosened travel restrictions on some of the island’s best-known dissidents, granting them one-time permission to travel abroad ahead of President Barack Obama’s trip to the island, activists said.

Obama has said his March 21-22 trip to Havana is designed to push the Cuban government to improve conditions for its people. Critics say Obama is rewarding the Cuban government despite its refusal to give citizens the ability to freely vote for their leaders and exercise their rights to free speech and assembly.