diff --git a/dnssleep.md b/dnssleep.md
index 53feebf..6103c86 100644
--- a/dnssleep.md
+++ b/dnssleep.md
@@ -1,9 +1,12 @@
 
-
 In dns mode, after the dns record is added, acme.sh will use cloudflare public dns or google dns to check if the record has taken effect.
 
-If you don't want this check, please use --dnssleep 300.
+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.
+
+The parameter is stored in `~/.acme.sh/<domain>/<domain.>.conf` using the variable
+
+    Le_DNSSleep='###'