diff --git a/maxun-core/src/browserSide/scraper.js b/maxun-core/src/browserSide/scraper.js
index 13d5de92..7fcdd443 100644
--- a/maxun-core/src/browserSide/scraper.js
+++ b/maxun-core/src/browserSide/scraper.js
@@ -428,7 +428,7 @@ async function clickNextPagination(selector, scrapedData, limit) {
   };
 
 
-  window.scrollDown = async (selector, limit) {
+  window.scrollDown = async function(selector, limit) {
     let previousHeight = 0;
     let itemsLoaded = 0;
 
@@ -447,7 +447,7 @@ async function clickNextPagination(selector, scrapedData, limit) {
     }
   }
 
-  window.scrollUp = async (selector, limit) {
+  window.scrollUp = async function(selector, limit) {
     let previousHeight = 0;
     let itemsLoaded = 0;