diff --git a/browser/components/MarkdownPreview.js b/browser/components/MarkdownPreview.js
index 55b36243..17b13a51 100755
--- a/browser/components/MarkdownPreview.js
+++ b/browser/components/MarkdownPreview.js
@@ -845,7 +845,7 @@ export default class MarkdownPreview extends React.Component {
     _.forEach(
       this.refs.root.contentWindow.document.querySelectorAll('.mermaid'),
       el => {
-        mermaidRender(el, htmlTextHelper.decodeEntities(el.innerHTML), theme)
+        mermaidRender(el, htmlTextHelper.encodeEntities(el.innerHTML), theme)
       }
     )