diff --git a/_site/auto-refresh.html b/_site/auto-refresh.html
index a5c6ebe..8c8e8d3 100644
--- a/_site/auto-refresh.html
+++ b/_site/auto-refresh.html
@@ -7,7 +7,7 @@
         document.getElementById('articles-1').style.zIndex = "2";
         document.getElementById('articles-2').style.zIndex = "1";
         document.getElementById('articles-2').contentWindow.location.reload(true);
-        document.getElementsByClass('twitter-timeline')[0].contentWindow.location.reload(true);
+        document.getElementsByClassName('twitter-timeline')[0].contentWindow.location.reload(true);
         setTimeout(function() {
             document.getElementById('articles-2').style.zIndex = "2";
             document.getElementById('articles-1').style.zIndex = "1";
diff --git a/auto-refresh.md b/auto-refresh.md
index 10ce193..ea87084 100644
--- a/auto-refresh.md
+++ b/auto-refresh.md
@@ -13,7 +13,7 @@ layout: none
         document.getElementById('articles-1').style.zIndex = "2";
         document.getElementById('articles-2').style.zIndex = "1";
         document.getElementById('articles-2').contentWindow.location.reload(true);
-        document.getElementsByClass('twitter-timeline')[0].contentWindow.location.reload(true);
+        document.getElementsByClassName('twitter-timeline')[0].contentWindow.location.reload(true);
         setTimeout(function() {
             document.getElementById('articles-2').style.zIndex = "2";
             document.getElementById('articles-1').style.zIndex = "1";