While he decided the heads of the various Vatican offices will keep their jobs for now, he's not making any definitive appointments, the Vatican said Saturday.

CNN Vatican analyst John Allen, who's also a correspondent for the National Catholic Reporter, said this is the first clear signal that he may be serious about reform.

"It's customary for new popes to swiftly reconfirm the department heads who lose their positions when the previous pontificate ends, and then take his time about bringing in his team," Allen said.

"The fact that Francis has not followed that path may suggest that significant personnel moves will come sooner rather than later."

Francis wants "a certain period for reflection, prayer and dialogue before (making) any definitive nomination or confirmation," a Vatican statement said.