---
page_type: error
code: 20011
message: "20011: Invalid TLS version"
level: ERROR
---

## Error Code 20011

### Invalid TLS version

The request was rejected because it was not correctly configured to use TLSv1.2. All new accounts are [required to use TLSv1.2 with supported ciphers suites](https://support.twilio.com/hc/en-us/articles/360007724794).

#### Possible Solutions:

- Reconfigure request to use a supported cipher suite for TLSv1.2
- Review these [tips for upgrading your environment to TLSv1.2](https://support.twilio.com/hc/en-us/articles/360006751753)