You can easily update WhatsApp from your device’s app store. Please note, if you received a message that isn’t supported by your version of WhatsApp, you’ll need to update the app. We encourage you to always use the latest version of WhatsApp. Latest versions contain the newest features and bug fixes.
Android
Find WhatsApp Messenger in the Google Play Store, then tap Update.
iPhone
Find WhatsApp Messenger in the Apple App Store, then tap UPDATE.