diff --git a/source/index.html.md b/source/index.html.md
index 893e071..49fd4a0 100644
--- a/source/index.html.md
+++ b/source/index.html.md
@@ -154,7 +154,7 @@ curl "http://example.com/api/kittens/2"
 
 This endpoint retrieves a specific kitten.
 
-<aside class="warning">If you're not using an administrator API key, note that some kittens will return 403 Forbidden if they are hidden for admins only.</aside>
+<aside class="warning">Inside HTML code blocks like this one, you can't use Markdown, so use <code>&lt;code&gt;</code> blocks to denote code.</aside>
 
 ### HTTP Request