diff --git a/web/react/components/post_right.jsx b/web/react/components/post_right.jsx
index 7315266e69..3a5be4e087 100644
--- a/web/react/components/post_right.jsx
+++ b/web/react/components/post_right.jsx
@@ -351,6 +351,7 @@ module.exports = React.createClass({
         $(".post-right__scroll").css("height", height + "px");
         $(".post-right__scroll").scrollTop(100000);
         $(".post-right__scroll").perfectScrollbar();
+        $(".post-right__scroll").perfectScrollbar('update');
     },
     render: function() {