diff --git a/browser/lib/markdown-it-fence.js b/browser/lib/markdown-it-fence.js
index 040ac540..c2a77a72 100644
--- a/browser/lib/markdown-it-fence.js
+++ b/browser/lib/markdown-it-fence.js
@@ -120,7 +120,7 @@ module.exports = function (md, renderers, defaultRenderer) {
     alt: ['paragraph', 'reference', 'blockquote', 'list']
   })
 
-  for (let name in renderers) {
+  for (const name in renderers) {
     md.renderer.rules[`${name}_fence`] = (tokens, index) => renderers[name](tokens[index])
   }
 
diff --git a/browser/lib/markdown-it-sanitize-html.js b/browser/lib/markdown-it-sanitize-html.js
index 05e5e7be..fb7267ee 100644
--- a/browser/lib/markdown-it-sanitize-html.js
+++ b/browser/lib/markdown-it-sanitize-html.js
@@ -14,7 +14,7 @@ module.exports = function sanitizePlugin (md, options) {
           options
         )
       }
-      if (state.tokens[tokenIdx].type === 'fence') {
+      if (state.tokens[tokenIdx].type === '_fence') {
         // escapeHtmlCharacters has better performance
         state.tokens[tokenIdx].content = escapeHtmlCharacters(
           state.tokens[tokenIdx].content,