diff --git a/browser/components/MarkdownPreview.js b/browser/components/MarkdownPreview.js
index c5fbc949..5f357ae8 100644
--- a/browser/components/MarkdownPreview.js
+++ b/browser/components/MarkdownPreview.js
@@ -49,6 +49,7 @@ body {
 }
 code {
   font-family: ${codeBlockFontFamily.join(', ')};
+  background-color: rgba(0,0,0,0.04);
 }
 .lineNumber {
   ${lineNumber && 'display: block !important;'}