A refurbished SpaceX Crew Dragon spaceship linked up with the International Space Station early Saturday more than 260 miles above Earth, delivering four veteran astronauts to the orbiting research complex and temporarily raising the lab’s crew complement to 11.

NASA’s last space shuttle commander — former U.S. Navy fighter pilot Chris Ferguson — will fly Boeing’s CST-100 Starliner crew capsule on its first piloted test mission to the International Space Station next year.

Astronauts will not fly to the International Space Station on SpaceX’s Crew Dragon spaceship until at least May 2018, NASA said this week, missing a previous target launch date at the end of next year.