diff --git a/website/content/guide/customization.md b/website/content/guide/customization.md
index e27c9868..027fa073 100644
--- a/website/content/guide/customization.md
+++ b/website/content/guide/customization.md
@@ -25,7 +25,7 @@ and message `HTTPError.Message`.
 
 Enables/disables debug mode.
 
-## Log prefix
+### Log prefix
 
 `echo#SetLogPrefix(prefix string)`