diff --git a/index.html.php b/index.html.php
index 92e0d45..cb2004b 100644
--- a/index.html.php
+++ b/index.html.php
@@ -14,10 +14,10 @@
     <div class="px-4 py-5 my-5 text-center">
         <h1 class="display-5 fw-bold"><i class="bi bi-vector-pen"></i> Signer un PDF</h1>
         <div class="col-lg-3 mx-auto">
-            <form action="/upload" method="POST" class="row g-3" enctype="multipart/form-data">
+            <form id="form_pdf_upload" action="/upload" method="POST" class="row g-3" enctype="multipart/form-data">
                 <div class="col-12">
                   <label for="formFileLg" class="form-label">Choisir un PDF</label>
-                  <input class="form-control form-control-lg" name="pdf" type="file">
+                  <input id="input_pdf_upload" class="form-control form-control-lg" name="pdf" type="file">
                 </div>
                 <div class="col-12">
                     <div class="d-grid gap-2">
@@ -29,5 +29,10 @@
     </div>
     
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js" integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf" crossorigin="anonymous"></script>
+    <script type="text/javascript">
+        document.getElementById('input_pdf_upload').addEventListener('change', function(event) {
+            document.getElementById('form_pdf_upload').submit();
+        });
+    </script>
 </body>
 </html>