diff --git a/doc/comment_action.md b/doc/comment_action.md
index 5f8d9e2..fa99f8c 100644
--- a/doc/comment_action.md
+++ b/doc/comment_action.md
@@ -1,3 +1,5 @@
+# About Action in Issue Comment
+
 After the issue creation at GitBucket, users can add comments or close it.
 The details are saved at ```ISSUE_COMMENT``` table.