diff --git a/types/office-js/index.d.ts b/types/office-js/index.d.ts
index 31b2571a5e..8d89d895f6 100644
--- a/types/office-js/index.d.ts
+++ b/types/office-js/index.d.ts
@@ -1020,6 +1020,11 @@ declare namespace Office {
          * - Called from a module extension: No effect.
          */
         closeContainer(): void;
+        /**
+         * Opens a browser window and loads the specified URL. 
+         * @param url The full URL to be opened including protocol (e.g., https), and port number, if any.
+         */
+        openBrowserWindow(url: string): void;
     }
 
     /**