diff --git a/build/api/module/professor/pdfController.php b/build/api/module/professor/pdfController.php
index 2971bd4..9d6ffe4 100644
--- a/build/api/module/professor/pdfController.php
+++ b/build/api/module/professor/pdfController.php
@@ -148,7 +148,7 @@ class pdfController{
 		$headers = [
 			// 'Content-Description'       => 'File Transfer',
 			'Content-Transfer-Encoding' => 'binary',
-			'Content-Disposition'       => 'attachment; filename=\"'.$title.'\"',
+			'Content-Disposition'       => 'attachment; filename=\"'.$title.'\.pdf"',
 			'Cache-Control'             => 'public, must-revalidate, max-age=0',
 			'Pragma'                    => 'public',
 			'X-Generator'               => 'mPDF',