Singapore’s ruling party must open up to much greater debate of its policies and future plans, its prime minister said on Monday, after an election in which the opposition made historic inroads into its unbroken grip on power.

Lee Hsien Loong, whose People’s Action Party (PAP) has governed the city-state since independence in 1965, won all but 10 of 93 seats in parliament in the July 10 ballot but its share of the vote dropped nine points from the last election in 2015.