WannaCoffee? Starbucks payment systems outages blamed on 'routine software update'
Cash registers were pushed offline during the update, according to Starbucks spokeswoman Madeleine Löwenborg-Frick.
"Our systems have not been compromised by any third party," she told Reuters, adding the affected stores should be back online "shortly."
Löwenborg-Frick would not indicate how many stores were impacted by the outage.
The software update was done in routine fashion, the company said in a statement.
"As part of our normal course of business, overnight we worked to install a technology update to our store registers in the U.S. and Canada," the company said, according to CNBC.
"The stores will remain open during this time and, as always, our partners are prepared to take care of our customers to ensure they have the best experience possible," the company added.
Some stores that remained open during the outage required customers to pay cash only for their morning coffee. Others offered customers a free beverage for the inconvenience, according to reports.
When we order 7 Ventis at Starbucks and it's on the house because their systems down 🙌🏻— Gav (@GavinJNavarro) May 16, 2017
Some on social media assumed the outage was related to the weekend's worldwide ransomware attack, known as WannaCry, that infected hundreds of thousands of computers in 150 countries.
Anecdotal but the barista at Starbucks said they were hit by #wannacry which disabled their systems nationwide. Not seeing anything about it— DFW Examiner (@dfw3xaminer) May 16, 2017