diff --git a/README.md b/README.md
index b00fb93..354738a 100644
--- a/README.md
+++ b/README.md
@@ -30,9 +30,13 @@
 cat data/secrets/initialAdminPassword
 ```
 
-
 Goto `http://localhost:8080`
 
+### register host key
+```
+docker-compose exec master-jenkins ssh [SSH_HOST] -p [SSH_PORT]
+```
+
 
 ## License
 [![cc-bc-sa](https://i.creativecommons.org/l/by-sa/4.0/88x31.png)](http://creativecommons.org/licenses/by-sa/4.0/): Please see [license](LICENSE.md)