diff --git a/wp-content/plugins/candela-utility/themes/bombadil/js/iframe_resizer.js b/wp-content/plugins/candela-utility/themes/bombadil/js/iframe_resizer.js
index 8309dbe5..7266a2e4 100644
--- a/wp-content/plugins/candela-utility/themes/bombadil/js/iframe_resizer.js
+++ b/wp-content/plugins/candela-utility/themes/bombadil/js/iframe_resizer.js
@@ -6,7 +6,7 @@
    parent.postMessage(JSON.stringify({
       subject: "lti.frameResize",
       height: default_height,
-      iframe_resize_id: "lumen_assessment_1"
+      element_id: "lumen_assessment_1"
   }), "*");
 
  * The element_id needed is passed as a query parameter `iframe_resize_id`
@@ -34,4 +34,4 @@ if (self == top) {
             (console.error || console.log)('invalid message received from ', e.origin);
         }
     });
-}
\ No newline at end of file
+}