diff --git a/docs/swml/methods/answer.mdx b/docs/swml/methods/answer.mdx
index f3421e63..f6e9f4a7 100644
--- a/docs/swml/methods/answer.mdx
+++ b/docs/swml/methods/answer.mdx
@@ -19,6 +19,8 @@ The `answer` method expects the following parameters.
 | Name                                                         | Type      | Default                   | Description                                                   |
 |:-------------------------------------------------------------|:----------|:--------------------------|:--------------------------------------------------------------|
 | `max_duration`<span className="optional-arg">Optional</span> | `integer` | `14400` seconds (4 hours) | Maximum duration in seconds. Can not be less than 15 seconds. |
+| `sip_auth_username`<span className="optional-arg">Optional</span> | `string`  | -             | Username to use for SIP authentication.                                                                                               |
+| `sip_auth_password`<span className="optional-arg">Optional</span> | `string`  | -             | Password to use for SIP authentication.                                                                                               |
 
 ---
 
diff --git a/docs/swml/methods/sip_refer.mdx b/docs/swml/methods/sip_refer.mdx
index a6e56df7..4a760565 100644
--- a/docs/swml/methods/sip_refer.mdx
+++ b/docs/swml/methods/sip_refer.mdx
@@ -14,10 +14,13 @@ Send SIP REFER to a SIP call.
 
 ## **sip_refer Parameters**
 
-| Name                                                    | Type     | Description          |
-|:--------------------------------------------------------|:---------|:---------------------|
-| `to_uri` <span className="required-arg">Required</span> | `string` | SIP URI to REFER to. |
-| `status_url`<span className="optional-arg">Optional</span>         | `string`  | -             | HTTP or HTTPS URL to deliver receive fax status events.                                                                                               |
+| Name                                                    | Type     | Default | Description          |
+|:--------------------------------------------------------|:---------|:--------|:---------------------|
+| `to_uri` <span className="required-arg">Required</span> | `string` | -       | SIP URI to REFER to. |
+| `status_url`<span className="optional-arg">Optional</span> | `string`  | -             | HTTP or HTTPS URL to deliver receive fax status events.                                                                                               |
+| `sip_auth_username`<span className="optional-arg">Optional</span> | `string`  | -             | Username to use for SIP authentication.                                                                                               |
+| `sip_auth_password`<span className="optional-arg">Optional</span> | `string`  | -             | Password to use for SIP authentication.                                                                                               |
+
 
 ## **Variables**