diff --git a/bandwidth.yml b/bandwidth.yml
index c4b1fb2b..11c79d23 100644
--- a/bandwidth.yml
+++ b/bandwidth.yml
@@ -2202,8 +2202,8 @@ components:
parameter as described in RFC
- 7433. Only 'jwt' and 'base64' encodings are allowed. The entire
- value
+ 7433. Only 'jwt', 'base64' and 'hex' encodings are allowed. The
+ entire value
cannot exceed 350 characters, including parameters and separators.
applicationId:
diff --git a/docs/CreateCall.md b/docs/CreateCall.md
index ca15307b..20340a83 100644
--- a/docs/CreateCall.md
+++ b/docs/CreateCall.md
@@ -8,7 +8,7 @@
| **from** | **String** | A Bandwidth phone number on your account the call should come from (must be in E.164 format, like `+15555551212`) even if `privacy` is set to true. | |
| **privacy** | **Boolean** | Hide the calling number. The `displayName` field can be used to customize the displayed name. | [optional] |
| **display_name** | **String** | The caller display name to use when the call is created. May not exceed 256 characters nor contain control characters such as new lines. If `privacy` is true, only the following values are valid: `Restricted`, `Anonymous`, `Private`, or `Unavailable`. | [optional] |
-| **uui** | **String** | A comma-separated list of 'User-To-User' headers to be sent in the INVITE when calling a SIP URI. Each value must end with an 'encoding' parameter as described in <a href='https://tools.ietf.org/html/rfc7433'>RFC 7433</a>. Only 'jwt' and 'base64' encodings are allowed. The entire value cannot exceed 350 characters, including parameters and separators. | [optional] |
+| **uui** | **String** | A comma-separated list of 'User-To-User' headers to be sent in the INVITE when calling a SIP URI. Each value must end with an 'encoding' parameter as described in <a href='https://tools.ietf.org/html/rfc7433'>RFC 7433</a>. Only 'jwt', 'base64' and 'hex' encodings are allowed. The entire value cannot exceed 350 characters, including parameters and separators. | [optional] |
| **application_id** | **String** | The id of the application associated with the `from` number. | |
| **answer_url** | **String** | The full URL to send the <a href='/docs/voice/webhooks/answer'>Answer</a> event to when the called party answers. This endpoint should return the first <a href='/docs/voice/bxml'>BXML document</a> to be executed in the call. Must use `https` if specifying `username` and `password`. | |
| **answer_method** | [**CallbackMethodEnum**](CallbackMethodEnum.md) | | [optional][default to 'POST'] |
diff --git a/lib/bandwidth-sdk/models/create_call.rb b/lib/bandwidth-sdk/models/create_call.rb
index 0569ad38..32acc113 100644
--- a/lib/bandwidth-sdk/models/create_call.rb
+++ b/lib/bandwidth-sdk/models/create_call.rb
@@ -27,7 +27,7 @@ class CreateCall
# The caller display name to use when the call is created. May not exceed 256 characters nor contain control characters such as new lines. If `privacy` is true, only the following values are valid: `Restricted`, `Anonymous`, `Private`, or `Unavailable`.
attr_accessor :display_name
- # A comma-separated list of 'User-To-User' headers to be sent in the INVITE when calling a SIP URI. Each value must end with an 'encoding' parameter as described in RFC 7433. Only 'jwt' and 'base64' encodings are allowed. The entire value cannot exceed 350 characters, including parameters and separators.
+ # A comma-separated list of 'User-To-User' headers to be sent in the INVITE when calling a SIP URI. Each value must end with an 'encoding' parameter as described in RFC 7433. Only 'jwt', 'base64' and 'hex' encodings are allowed. The entire value cannot exceed 350 characters, including parameters and separators.
attr_accessor :uui
# The id of the application associated with the `from` number.