diff --git a/sortt.js b/sortt.js
index 8f0d13a..61c63fd 100644
--- a/sortt.js
+++ b/sortt.js
@@ -50,11 +50,9 @@ window.sortt=function(normsort,revsort,isdefault){
   */
 
   if (url_sort != normsort) {
-    url.searchParams.delete("sort");
-    url.searchParams.append("sort",normsort);
+    url.searchParams.set("sort",normsort);
   } else if (revsort != "") {
-    url.searchParams.delete("sort");
-    url.searchParams.append("sort",revsort);
+    url.searchParams.set("sort",revsort);
   }
 
   //open url