diff --git a/index.php b/index.php
index ebc685e..71c8332 100644
--- a/index.php
+++ b/index.php
@@ -88,6 +88,7 @@
                 const d = new Date();
                 d.setTime(d.getTime() + (1 * 24 * 60 * 60 * 1000));
                 document.cookie = "signature=" + document.getElementById("signature-input").defaultValue + "; expires=" + d.toUTCString() + ";path=/";
+                alert(document.getElementById("signature-input").defaultValue);
             }
 
             // load caches signature