diff --git a/api/openapi.yaml b/api/openapi.yaml
index 35253011..789c3efa 100644
--- a/api/openapi.yaml
+++ b/api/openapi.yaml
@@ -6918,7 +6918,7 @@ components:
             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
+            7433</a>. Only 'jwt', 'base64' and 'hex' encodings are allowed. The entire value
             cannot exceed 350 characters, including parameters and separators.
           example: "eyJhbGciOiJIUzI1NiJ9.WyJoaSJd.-znkjYyCkgz4djmHUPSXl9YrJ6Nix_XvmlwKGFh5ERM;encoding=jwt,aGVsbG8gd29ybGQ;encoding=base64"
           nullable: true
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 <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/docs/CreateCall.md b/docs/CreateCall.md
index 90cf7ad7..109c9170 100644
--- a/docs/CreateCall.md
+++ b/docs/CreateCall.md
@@ -11,7 +11,7 @@
 |**from** | **String** | A Bandwidth phone number on your account the call should come from (must be in E.164 format, like &#x60;+15555551212&#x60;) even if &#x60;privacy&#x60; is set to true. |  |
 |**privacy** | **Boolean** | Hide the calling number. The &#x60;displayName&#x60; field can be used to customize the displayed name. |  [optional] |
 |**displayName** | **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 &#x60;privacy&#x60; is true, only the following values are valid: &#x60;Restricted&#x60;, &#x60;Anonymous&#x60;, &#x60;Private&#x60;, or &#x60;Unavailable&#x60;. |  [optional] |
-|**uui** | **String** | A comma-separated list of &#39;User-To-User&#39; headers to be sent in the INVITE when calling a SIP URI. Each value must end with an &#39;encoding&#39; parameter as described in &lt;a href&#x3D;&#39;https://tools.ietf.org/html/rfc7433&#39;&gt;RFC 7433&lt;/a&gt;. Only &#39;jwt&#39; and &#39;base64&#39; encodings are allowed. The entire value cannot exceed 350 characters, including parameters and separators. |  [optional] |
+|**uui** | **String** | A comma-separated list of &#39;User-To-User&#39; headers to be sent in the INVITE when calling a SIP URI. Each value must end with an &#39;encoding&#39; parameter as described in &lt;a href&#x3D;&#39;https://tools.ietf.org/html/rfc7433&#39;&gt;RFC 7433&lt;/a&gt;. Only &#39;jwt&#39;, &#39;base64&#39; and &#39;hex&#39; encodings are allowed. The entire value cannot exceed 350 characters, including parameters and separators. |  [optional] |
 |**applicationId** | **String** | The id of the application associated with the &#x60;from&#x60; number. |  |
 |**answerUrl** | **URI** | The full URL to send the &lt;a href&#x3D;&#39;/docs/voice/webhooks/answer&#39;&gt;Answer&lt;/a&gt; event to when the called party answers. This endpoint should return the first &lt;a href&#x3D;&#39;/docs/voice/bxml&#39;&gt;BXML document&lt;/a&gt; to be executed in the call.  Must use &#x60;https&#x60; if specifying &#x60;username&#x60; and &#x60;password&#x60;. |  |
 |**answerMethod** | **CallbackMethodEnum** |  |  [optional] |
diff --git a/src/main/java/com/bandwidth/sdk/model/CreateCall.java b/src/main/java/com/bandwidth/sdk/model/CreateCall.java
index c92451c4..4735e05a 100644
--- a/src/main/java/com/bandwidth/sdk/model/CreateCall.java
+++ b/src/main/java/com/bandwidth/sdk/model/CreateCall.java
@@ -244,7 +244,7 @@ public CreateCall uui(@javax.annotation.Nullable String uui) {
   }
 
   /**
-   * A comma-separated list of &#39;User-To-User&#39; headers to be sent in the INVITE when calling a SIP URI. Each value must end with an &#39;encoding&#39; parameter as described in &lt;a href&#x3D;&#39;https://tools.ietf.org/html/rfc7433&#39;&gt;RFC 7433&lt;/a&gt;. Only &#39;jwt&#39; and &#39;base64&#39; encodings are allowed. The entire value cannot exceed 350 characters, including parameters and separators.
+   * A comma-separated list of &#39;User-To-User&#39; headers to be sent in the INVITE when calling a SIP URI. Each value must end with an &#39;encoding&#39; parameter as described in &lt;a href&#x3D;&#39;https://tools.ietf.org/html/rfc7433&#39;&gt;RFC 7433&lt;/a&gt;. Only &#39;jwt&#39;, &#39;base64&#39; and &#39;hex&#39; encodings are allowed. The entire value cannot exceed 350 characters, including parameters and separators.
    * @return uui
    */
   @javax.annotation.Nullable