diff --git a/Dockerfile b/Dockerfile
index 6cd936d..ffdb73d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ghcr.io/appleboy/drone-ssh:1.6.12
+FROM ghcr.io/appleboy/drone-ssh:1.6.13
 
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
diff --git a/README.md b/README.md
index 783d892..425658d 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ See [action.yml](./action.yml) for more detailed information.
 * `debug` - enable debug mode
 * `use_insecure_cipher` - include more ciphers with use_insecure_cipher (see [#56](https://github.com/appleboy/ssh-action/issues/56))
 * `cipher` - the allowed cipher algorithms. If unspecified then a sensible
+* `envs_format` - flexible configuration of environment value transfer. default is `export {NAME}={VALUE}`
 
 SSH Proxy Setting:
 
diff --git a/action.yml b/action.yml
index 65891e8..3cdc797 100644
--- a/action.yml
+++ b/action.yml
@@ -65,6 +65,8 @@ inputs:
     default: false
   envs:
     description: 'pass environment variable to shell script'
+  envs_format:
+    description: 'flexible configuration of environment value transfer'
   debug:
     description: 'enable debug mode'
     default: false