# 81019: Twilio phone number using deprecated API version

Log Type: APPLICATION

Log Level: ERROR

## Description

The Twilio phone number connected to your Studio Flow is configured for the deprecated 2008-08-01 API, which is not compatible. Update the phone number API version to 2010-04-01.

### Possible causes

The Twilio phone number is configured for the 2008-08-01 API

### Possible solutions

Update the phone number API version to 2010-04-01