diff --git a/dnssleep.md b/dnssleep.md
index 7e1a2a0..53feebf 100644
--- a/dnssleep.md
+++ b/dnssleep.md
@@ -4,6 +4,6 @@ In dns mode, after the dns record is added, acme.sh will use cloudflare public d
 
 If you don't want this check, please use --dnssleep 300.
 
-acme.sh --issue -d xxxxx  --dns dns_xxx     --dnssleep 300
+    acme.sh --issue -d xxxxx  --dns dns_xxx     --dnssleep 300
 
 Then acme.sh will wait for 300 seconds instead of checking through the public dns.