You may wish to apply for a Singapore International Passport (i.e. BioPass) using the applications form (Form IMM E11 (OS) and Form P 28.3, links below) or submit it online at the ICA e-Services page
Notice to Travellers
Most countries require passports to be valid for at least 6 months on the date of entry. You are advised to renew your passport early.
For Singaporeans who are returning directly to Singapore, Singapore passports with validity less than 6 months is acceptable for the return journey. In such instances, flight tickets may only be purchased directly with the airline/service provider (not online ticket purchases).