Facebook Messenger will cease support for a number of smartphones this week.
The hugely-successful messaging app will no longer run on devices powered by Windows Phone 8.1 or earlier.
Those who use an iPhone or a recent version of Android do not need to panic.
Facebook has purportedly started to email those who will be affected by the upcoming device cull.
“Thank you for choosing to use Messenger,” the email reads.
“You’re using is no longer supported and you can no send and receive messages”
“We regret to inform you that since the end of March, the app version you’re using is no longer supported and you can no send and receive messages.”
It adds – “To continue to send and receive messages from Facebook on your phone, update your Facebook app to the latest version.”
Facebook Messenger is ending support for a number of smartphones
A number of new features to its Messenger client in recent weeks
The world’s most successful social network recently added Stories – a feature that lets users sum up their week with short video clips, photographs, GIFs and more.
The new addition was heavily criticised for its similarity to SnapChat Stories.
Facebook Messenger isn’t the only app to pull support for Windows Phone users in recent weeks.
Microsoft ended Skype support for dated Windows Phone devices earlier this month.
WhatsApp confirmed it would end support for its messaging app on the platform earlier in the year.
Windows Phone has seen a steady decline in users over the last year.
The operating system dropped from a 1.2 per cent market share at the end of 2015, to a new low of 0.3 per cent by the end of Microsoft’s third financial quarter in 2016.