diff --git a/index.html b/index.html
index 60db960..f81e069 100644
--- a/index.html
+++ b/index.html
@@ -39,7 +39,7 @@
         // In development we import locally.
         window.location.hostname === "localhost"
           ? "/dist/web/index.js"
-          : "https://unpkg.com/esp-web-flasher@1.0.0/dist/web/index.js?module"
+          : "https://unpkg.com/esp-web-flasher@5.1.1/dist/web/index.js?module"
       );
     </script>
     <script src="js/script.js" module defer></script>