New York (CNN) — Disney is curbing password sharing for its Disney+ streaming service as part of a larger effort to boost signups and revenue.

CEO Bob Iger, in a CNBC interview on Thursday, said its popular Disney+ streaming service will start cracking down on password sharing in June in some countries and more broadly in September. Although Disney+ and Disney’s other streaming services’ terms of service explicitly prevent customers from impersonating someone else by using their username or password, it hasn’t been broadly enforcing its policy.