diff --git a/static/js/getTextFromFile.js b/static/js/getTextFromFile.js
index c0c0dda2..7fff353c 100644
--- a/static/js/getTextFromFile.js
+++ b/static/js/getTextFromFile.js
@@ -1,8 +1,10 @@
 async function getTextFromFileUrlAsync(url) {
   return new Promise(function (resolve, reject) {
   var req = new XMLHttpRequest();
-  req.setRequestHeader("Cache-Control: no-cache, no-store, must-revalidate")
   req.open("GET",url, true);
+  for (const item of ["no-cache","no-store","must-revalidate"]) {
+    req.setRequestHeader("Cache-Control",item)
+  }
   req.onreadystatechange = function() {
     if (req.readyState == 4) {
       if (req.status == 200) {//when a good response is given do this