You can force your scale's internal software (AKA firmware) to update from the scale itself by following these steps:

1. Press and hold the button on the top side of the scale for at least 8 seconds
2. The scale will present three options: Info, Update, and Reset.
3. Press the button until the cursor lands on 'Update.'
4. Press and hold the button until the screen says 'Updating.'
5. Wait for the update to finish.
6. Your scale is now updated.

Note: This procedure will only work for a Wifi-configured scale.

You can also force an update from the Withings App by following these steps:

1. Go to Devices.
2. Select your scale.
3. Select Check for updates.
4. Follow the on-screen instructions.

Note: This procedure will work with both Wifi and Bluetooth-configured scales.