diff --git a/src/htmlForm.php b/src/htmlForm.php
index 66f77b6..8cca8a6 100644
--- a/src/htmlForm.php
+++ b/src/htmlForm.php
@@ -25,7 +25,7 @@ use Nwb\MultiDownloaderClient\MultiDownloaderClient;
 <body>
     <div id="button_div" class="modal-dialog-buttons">
         <form name="f" id="f" method="POST" action="<?= $this->url ?>/v2/form/zip" enctype="multipart/form-data">
-            <input type="hidden" name="json" value="<?= json_encode($this->buildRequest()) ?>" />
+            <input type="hidden" name="json" value='<?= json_encode($this->buildRequest()) ?>' />
 
             <noscript>
                 <button id="submit_approve_access" type="submit" tabindex="1" style="overflow:visible;">Continue</button>
