diff --git a/api/@internal/component/ets/web.d.ts b/api/@internal/component/ets/web.d.ts
index 8b1d51beeda1f4b7e8b363f89d1c53a488f6625f..2f75575b6db81a379df01e245b81a096d0557b7a 100644
--- a/api/@internal/component/ets/web.d.ts
+++ b/api/@internal/component/ets/web.d.ts
@@ -10185,6 +10185,15 @@ declare interface SslErrorEvent {
    * @since 12
    */
   isMainFrame: boolean;
+
+  /**
+   * Certificate chain data in DER format.
+   *
+   * @type { ?Array<Uint8Array> }
+   * @syscap SystemCapability.Web.Webview.Core
+   * @since 20
+   */
+  certChainData?: Array<Uint8Array>;
 }
 
 /**