diff --git a/bandwidth.yml b/bandwidth.yml
index c4b1fb2..11c79d2 100644
--- a/bandwidth.yml
+++ b/bandwidth.yml
@@ -2202,8 +2202,8 @@ components:
             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
+            7433</a>. Only 'jwt', 'base64' and 'hex' encodings are allowed. The
+            entire value
 
             cannot exceed 350 characters, including parameters and separators.
         applicationId:
diff --git a/models/create-call.ts b/models/create-call.ts
index fc31f1d..462f1ed 100644
--- a/models/create-call.ts
+++ b/models/create-call.ts
@@ -51,7 +51,7 @@ export interface CreateCall {
      */
     'displayName'?: string | null;
     /**
-     * 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.
+     * 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.
      * @type {string}
      * @memberof CreateCall
      */