diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8494f9c..58d418c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,8 +7,8 @@ env:
 
 jobs:
 
-  build:
-    name: Build
+  testing01:
+    name: default flag testing
     runs-on: ubuntu-latest
     steps:
     - name: checkout
@@ -78,40 +78,6 @@ jobs:
           mkdir abc/def
           ls -al
 
-    - name: pass environment
-      uses: ./
-      env:
-        FOO: "BAR"
-      with:
-        host: ${{ secrets.HOST }}
-        username: ${{ secrets.USERNAME }}
-        key: ${{ secrets.KEY }}
-        port: ${{ secrets.PORT }}
-        envs: FOO
-        script: |
-          echo "I am $FOO, thanks"
-          echo "I am $BAR, thanks"
-
-    - name: pass multiple environment
-      uses: ./
-      env:
-        FOO: "BAR"
-        BAR: "FOO"
-        SHA: ${{ github.sha }}
-        PORT: ${{ secrets.PORT }}
-      with:
-        host: ${{ secrets.HOST }}
-        username: ${{ secrets.USERNAME }}
-        key: ${{ secrets.KEY }}
-        port: ${{ secrets.PORT }}
-        envs: FOO,BAR,SHA,PORT
-        script: |
-          echo "I am $FOO, thanks"
-          echo "I am $BAR, thanks"
-          echo "sha: $SHA"
-          echo "port: $PORT"
-          sh test.sh
-
     - name: ssh key passphrase
       uses: ./
       with:
@@ -172,3 +138,62 @@ jobs:
     #     key: ${{ secrets.ID_ED25519 }}
     #     port: ${{ secrets.TUNNEL_PORT }}
     #     script: whoami
+
+  testing02:
+    name: testing with envs
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout
+      uses: actions/checkout@v1
+
+    - name: pass environment
+      uses: ./
+      env:
+        FOO: "BAR"
+      with:
+        host: ${{ secrets.HOST }}
+        username: ${{ secrets.USERNAME }}
+        key: ${{ secrets.KEY }}
+        port: ${{ secrets.PORT }}
+        envs: FOO
+        script: |
+          echo "I am $FOO, thanks"
+          echo "I am $BAR, thanks"
+
+    - name: pass multiple environment
+      uses: ./
+      env:
+        FOO: "BAR"
+        BAR: "FOO"
+        SHA: ${{ github.sha }}
+        PORT: ${{ secrets.PORT }}
+      with:
+        host: ${{ secrets.HOST }}
+        username: ${{ secrets.USERNAME }}
+        key: ${{ secrets.KEY }}
+        port: ${{ secrets.PORT }}
+        envs: FOO,BAR,SHA,PORT
+        script: |
+          echo "I am $FOO, thanks"
+          echo "I am $BAR, thanks"
+          echo "sha: $SHA"
+          echo "port: $PORT"
+          sh test.sh
+
+    - name: custom envs format
+      uses: ./
+      env:
+        FOO: "BAR"
+        AAA: "BBB"
+      with:
+        host: ${{ secrets.HOST }}
+        username: ${{ secrets.USERNAME }}
+        key: ${{ secrets.KEY }}
+        port: ${{ secrets.PORT }}
+        envs: FOO,BAR,AAA
+        envs_format: export TEST_{NAME}={VALUE}
+        script: |
+          echo "I am $TEST_FOO, thanks"
+          echo "I am $TEST_BAR, thanks"
+          echo "I am $BAR, thanks"
+          echo "I am $TEST_AAA, thanks"
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