diff --git a/README.md b/README.md
index 2275238..1a9f602 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Markdown is a lightweight and easy-to-use syntax for styling your writing. It in
 ```markdown
 Syntax highlighted code block
 
-# Header 1
+# Header 123
 ## Header 2
 ### Header 3