diff --git a/source/js/back_to_top.js b/source/js/back_to_top.js
index e4235c8..cf56af1 100644
--- a/source/js/back_to_top.js
+++ b/source/js/back_to_top.js
@@ -143,6 +143,10 @@ $(document).ready(() => {
     $(window).scroll(update);
 
     $('#back-to-top').on('click', () => {
-        $('body, html').animate({ scrollTop: 0 }, 400);
+        if (CSS && CSS.supports && CSS.supports('(scroll-behavior: smooth)')) {
+            window.scroll({ top: 0, behavior: 'smooth' });
+        } else {
+            $('body, html').animate({ scrollTop: 0 }, 400);
+        }
     });
 });