diff --git a/src/renderer/scss/component/_markdown-preview.scss b/src/renderer/scss/component/_markdown-preview.scss
index d1841f690..53fa04924 100644
--- a/src/renderer/scss/component/_markdown-preview.scss
+++ b/src/renderer/scss/component/_markdown-preview.scss
@@ -34,7 +34,7 @@
   }
 
   h6 {
-    font-size: 1em;
+    font-size: 0.84em;
     color: var(--color-help);
   }
 }