The health of Pope Francis, who is suffering from a lung inflammation, is improving but he will read his Sunday message indoors from his residence to be on the safe side, the Vatican said on Saturday.

A statement said the 86-year-old pontiff had no fever and was continuing antibiotic treatment.

He normally reads the message from a window of the Apostolic Palace overlooking St. Peter’s Square. He would read it indoors to “avoid exposing himself to temperature changes,” the statement said.

Francis was forced to skip a planned trip to Dubai to made an address to the UN climate summit. The Vatican’s number two, Secretary of State Cardinal Pietro Parolin, read it on his behalf.