diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a84a4e3d79..896557b9ce 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,4 +1,4 @@
-### Welcome all contributors
+# Welcome all contributors
 
 Please observe the following rules:
 * All Issues and Features will be managed in the [**Issues Page**](https://github.com/wu-sheng/sky-walking/issues).