diff --git a/View/Helper/PhpExcelHelper.php b/View/Helper/PhpExcelHelper.php
index a199455..ad12850 100644
--- a/View/Helper/PhpExcelHelper.php
+++ b/View/Helper/PhpExcelHelper.php
@@ -338,6 +338,7 @@ public function output($filename = 'export.xlsx', $writer = 'Excel2007') {
 
         // writer
         $objWriter = $this->getWriter($writer);
+        $objWriter->setPreCalculateFormulas(true);
         $objWriter->save('php://output');
 
         exit;