diff --git a/kube_notify/mattermost.py b/kube_notify/mattermost.py
index 1e215f5..79cc9e7 100644
--- a/kube_notify/mattermost.py
+++ b/kube_notify/mattermost.py
@@ -16,7 +16,7 @@ def send_mattermost_message(
 ) -> None:
     # Construct the HTTP request for sending a message to Mattermost
     headers = {"Content-Type": "application/json"}
-    message = f"#### {title} : {description}\n"
+    message = f"##### {title} : {description}\n"
 
     for key, value in fields.items():
         message += f"**{key} :** {value}\n"