diff --git a/docs/model/CaptionsUpdatePayload.md b/docs/model/CaptionsUpdatePayload.md
index 8ff37e8..21519b1 100644
--- a/docs/model/CaptionsUpdatePayload.md
+++ b/docs/model/CaptionsUpdatePayload.md
@@ -5,7 +5,7 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**_default** | **boolean** |  |  [optional]
+**_default** | **boolean** | Set this parameter to `true` to define a caption as the default for a video. |  [optional]
 
 
 
diff --git a/src/model/CaptionsUpdatePayload.ts b/src/model/CaptionsUpdatePayload.ts
index f1f77c9..6440857 100644
--- a/src/model/CaptionsUpdatePayload.ts
+++ b/src/model/CaptionsUpdatePayload.ts
@@ -12,6 +12,9 @@
 import AttributeType from './AttributeType.js';
 
 export default class CaptionsUpdatePayload {
+  /**
+   * Set this parameter to `true` to define a caption as the default for a video.
+   */
   '_default'?: boolean;
 
   static readonly discriminator?: string = undefined;