diff --git a/How-to-use-OVH-domain-api.md b/How-to-use-OVH-domain-api.md
index a157a66..3ab3f90 100644
--- a/How-to-use-OVH-domain-api.md
+++ b/How-to-use-OVH-domain-api.md
@@ -12,7 +12,8 @@ export OVH_AK="your application key"
 # application secret
 export OVH_AS="your application secret"
 
-acme.sh --issue -d   mydomain.com   --dns   dns_ovh
+acme.sh --issue -d   mydomain.com   --dns   dns_ovh --server letsencrypt
+
 ```
 
 If you are first time using OVH api,  you are required to authenticate the api. (This only happens the first time.)
@@ -46,7 +47,8 @@ Click "Authorize Access"
 ## 4. Then go back to try again.
 
 ```
-acme.sh --issue -d   mydomain.com   --dns   dns_ovh
+acme.sh --issue -d   mydomain.com   --dns   dns_ovh --server letsencrypt
+
 ```
 
 Done.
@@ -69,7 +71,8 @@ export OVH_AK="your application key"
 
 export OVH_AS="your application secret"
 
-acme.sh --issue -d   mydomain.com   --dns   dns_ovh
+acme.sh --issue -d   mydomain.com   --dns   dns_ovh --server letsencrypt
+
 
 ```
 
@@ -108,7 +111,8 @@ export OVH_AS="your application secret"
 export OVH_CK="your consumer key"
 
 # Generate your certificate
-acme.sh --issue -d mydomain.com --dns dns_ovh
+acme.sh --issue -d mydomain.com --dns dns_ovh --server letsencrypt
+
 ```
 
 # Security