diff --git a/deploy/README.md b/deploy/README.md
index 4a13e096..d0235667 100644
--- a/deploy/README.md
+++ b/deploy/README.md
@@ -72,3 +72,8 @@ export DEPLOY_EXIM4_RELOAD="/etc/init.d/exim4 restart"
 acme.sh --deploy -d ftp.example.com --deploy-hook exim4
 ```
 
+## 6. Deploy the cert to local strongswan server.
+
+```sh
+acme.sh --deploy -d ftp.example.com --deploy-hook strongswan
+```