diff --git a/main/gradebook/gradebook_display_certificate.php b/main/gradebook/gradebook_display_certificate.php
index 80cfacd03d..658b32ce65 100755
--- a/main/gradebook/gradebook_display_certificate.php
+++ b/main/gradebook/gradebook_display_certificate.php
@@ -159,6 +159,19 @@ switch ($action) {
         header('Location: '.$url);
         exit;
         break;
+    case 'download_all_certificates':
+        $courseCode = api_get_course_id();
+        $sessionId = api_get_session_id();
+        $categoryId = (int) $_GET['catId'];
+        $date = api_get_utc_datetime(null, false, true);
+        $pdfName = 'certs_'.$courseCode.'_'.$sessionId.'_'.$categoryId.'_'.$date->format('Y-m-d');
+        $finalFile = api_get_path(SYS_ARCHIVE_PATH)."$pdfName.pdf";
+
+        $result = DocumentManager::file_send_for_download($finalFile, true);
+        if (false === $result) {
+            api_not_allowed(true);
+        }
+        break;
 }
 
 $interbreadcrumb[] = [
diff --git a/main/gradebook/lib/GradebookUtils.php b/main/gradebook/lib/GradebookUtils.php
index f1dff271a1..0446b08faa 100644
--- a/main/gradebook/lib/GradebookUtils.php
+++ b/main/gradebook/lib/GradebookUtils.php
@@ -1732,6 +1732,7 @@ class GradebookUtils
         $imgSrcLoading = api_get_path(WEB_LIBRARY_JS_PATH).'loading.gif';
         $imgSrcPdf = Display::return_icon('pdf.png', '', [], ICON_SIZE_MEDIUM, false, true);
 
+        $urlDownload = api_get_path(WEB_CODE_PATH).'gradebook/gradebook_display_certificate.php?'.api_get_cidreq().'&action=download_all_certificates&catId='.$categoryId;
         return "<script>
             $(function () {
                 var \$btnExport = $('$buttonSelector'),
@@ -1742,7 +1743,7 @@ class GradebookUtils
                         \$btnExport.find('img').prop('src', '$imgSrcPdf');
                         window.clearInterval(interval);
                         window.removeEventListener('beforeunload', onbeforeunloadListener);
-                        window.location.href = response;
+                        window.location.href = '".$urlDownload."';
                     }
                 }