diff --git a/src/guide/migration/custom-elements-interop.md b/src/guide/migration/custom-elements-interop.md
index a49bc7b087..afc1f88b5b 100644
--- a/src/guide/migration/custom-elements-interop.md
+++ b/src/guide/migration/custom-elements-interop.md
@@ -5,7 +5,7 @@ badges:
 
 # Custom Elements Interop <MigrationBadges :badges="$frontmatter.badges" />
 
-# Overview
+## Overview
 
 - **BREAKING:** Custom elements whitelisting is now performed during template compilation, and should be configured via compiler options instead of runtime config.
 - **BREAKING:** Special `is` prop usage is restricted to the reserved `<component>` tag only.