Dorset Police's cyber crime unit is warning residents to update WhatsApp immediately due to a security threat.

WhatsApp has today announced that a critical security flaw makes is possible for hackers to spy on your device by infecting it with malware.

The problem can be fixed by updating the app.

Here's how to update WhatsApp:

Android

​Go to the Play Store

Tap Menu > My apps & games

Tap UPDATE next to WhatsApp messenger

​iPhone/iOS

​Go to the App Store

Tap Updates

Tap UPDATE next to WhatsApp Messenge

Government advice published by the National Cyber Security Centre recommends that you protect your device by installing updates as soon as they become available.

They contain vital security updates to help protect your laptop, smartphone or tablet.