Apple Pay is finally ready to move beyond apps.

Apple has been telling potential partners that its payment service, which lets shoppers complete a purchase on mobile apps with their fingerprint rather than by entering credit card details, is expanding to websites later this year, multiple sources indicated.

The service will be available to shoppers using the Safari browser on models of iPhones and iPads that possess Apple’s TouchID fingerprint technology, these people said. Apple has also considered making the service available on Apple laptops and desktops, too, though it’s not clear if the company will launch that capability.

Sources say that Apple is telling potential partners that the Apple Pay expansion to mobile websites will be ready before this year’s holiday shopping season. An announcement could come at WWDC, Apple’s conference for software developers, which typically takes place in June, though sources cautioned that the timing of an announcement could change.

An Apple spokesperson declined to comment.

The move would pit Apple more directly against PayPal, which is a popular alternative payment method on countless retail websites. PayPal offers a mobile payment product for websites and apps called One Touch, which is used by more than 250 of the top 500 online retailers. But Apple Pay is still a quicker and cleaner express-checkout option for iPhone users and can now compete with PayPal on more checkout pages.

PayPal also owns payment processing company Braintree, which handles the back end of some Apple Pay purchases in apps today. But PayPal typically makes more money when a shopper chooses to pay with the PayPal wallet than with Apple Pay.

A PayPal spokesperson declined to comment.