Air Canada has stated that a data breach may have affected about 20,000 of its 1.7 million mobile app users.
Customer data may have been improperly accessed during the between August 22 and 24th. The level of exposure is basic PII data such as customer's names, email addresses and phone numbers. The airline has stated that all customer credit card information is stored and encrypted according to PCI standards and was not subject to the breach. That said, it is concerning that part of the PII data could include your passport information.
It is highly encouraged for you to change your password and make it more complicated to guess and also use one that you are not using for other services.