diff --git a/How-to-issue-a-cert.md b/How-to-issue-a-cert.md
index 4fa50d2..06c9e52 100644
--- a/How-to-issue-a-cert.md
+++ b/How-to-issue-a-cert.md
@@ -64,7 +64,7 @@ acme.sh  --issue  -d aa.com  --dns dns-cf  -d www.aa.com
 ```
 
 
-### 2. Multiple domains, SAN mode,  Hybrid mode
+### 3. Multiple domains, SAN mode,  Hybrid mode
 
 Issue a single cert including multiple domains.  Each domain uses a different validation method.