Changing the new Passport no. on DS-160

I have a confirmed appointment for interview next month. My Passport has expired and I have received new passport. The passport no. on DS-160 is of old one. Should I have a new appointment or should proceed with both passports, (old and new)?

You should submit a new DS-160 with new passport number and carry both old and new DS-160 to your interview. No need to change your appointment.