diff --git a/public/js/plugins/history.js b/public/js/plugins/history.js
index 68cc3d2..8a37ef4 100644
--- a/public/js/plugins/history.js
+++ b/public/js/plugins/history.js
@@ -49,6 +49,7 @@ define('history', [], function() {
             if (this.note.IsMarkdown) {
                 wrap = '<pre>';
                 wrapEnd = '</pre>';
+                content = trimTitle(content) // for xss
             }
             $historyContent.html(wrap + content + wrapEnd);