diff --git a/src/http_server/index_js.rs b/src/http_server/index_js.rs
index c510a82..174bfe2 100644
--- a/src/http_server/index_js.rs
+++ b/src/http_server/index_js.rs
@@ -29,6 +29,9 @@ window.addEventListener("load", async () => {
         window.location.reload()
     }, 60_000)
 })
+
+// notify the SDK that the iframe is ready
+window.parent.postMessage("verify_ready")
 "#;
 
 #[derive(Deserialize)]