diff --git a/README.md b/README.md
index f0dc6ad..cf72919 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Update a firewall rule that relies on dynamic DNS names
 
-# What
+## What
 
 Script `update-firewall-source.py`, UFS for short, assists `firewalld` in writing `iptables`-compatible rules, the so-called _direct_ rules.