diff --git a/mobile_upload.php b/mobile_upload.php
index 00da223..dff02c8 100644
--- a/mobile_upload.php
+++ b/mobile_upload.php
@@ -30,6 +30,11 @@ require_once __DIR__.'/class/upload_token.class.php';
 $token = (string) ($_REQUEST['token'] ?? '');
 $tok = BerichtUploadToken::fetchValid($db, $token);
 
+// Cache-Control: PWA-Seite NICHT cachen (immer frisch vom Server)
+header('Cache-Control: no-cache, no-store, must-revalidate');
+header('Pragma: no-cache');
+header('Expires: 0');
+
 // POST = Datei-Upload
 if ($_SERVER['REQUEST_METHOD'] === 'POST' && !empty($_FILES['file']['tmp_name'])) {
     header('Content-Type: application/json; charset=utf-8');