diff --git a/lib/core/renderMarkdown.js b/lib/core/renderMarkdown.js
index 20775cc3f2..f7b071b874 100644
--- a/lib/core/renderMarkdown.js
+++ b/lib/core/renderMarkdown.js
@@ -28,6 +28,9 @@ class MarkdownRenderer {
       highlight(str, lang) {
         lang =
           lang || (siteConfig.highlight && siteConfig.highlight.defaultLang);
+        if (lang === 'text') {
+          return str;
+        }
         if (lang) {
           try {
             if (