diff --git a/Jenkinsfile.pjt b/Jenkinsfile.pjt
index 36a6052..c1d786d 100644
--- a/Jenkinsfile.pjt
+++ b/Jenkinsfile.pjt
@@ -100,20 +100,22 @@ pipeline {
       steps {
         sshagent(['ssh-pjt']) {
           withCredentials([usernamePassword(
-            credentialsId: "${DOCKER_CRED}",
-            usernameVariable: 'REG_USER',
-            passwordVariable: 'REG_PASS'
+            credentialsId: DOCKER_CRED,
+            usernameVariable: 'DOCKER_USER',
+            passwordVariable: 'DOCKER_PASS'
           )]) {
             sh '''
               set -e
 
-              ssh -p ${SSH_PORT} -o StrictHostKeyChecking=no \
+              ssh -p ${SSH_PORT} \
+                -o StrictHostKeyChecking=no \
+                -o UserKnownHostsFile=/dev/null \
                 ${SSH_USER}@${SSH_HOST} \
                 REGISTRY_HOST="${REGISTRY_HOST}" \
-                REG_USER="${REG_USER}" \
-                REG_PASS="${REG_PASS}" \
+                DOCKER_USER="${DOCKER_USER}" \
+                DOCKER_PASS="${DOCKER_PASS}" \
                 'set -e
-                 echo "$REG_PASS" | docker login "$REGISTRY_HOST" -u "$REG_USER" --password-stdin
+                 echo "$DOCKER_PASS" | docker login "$REGISTRY_HOST" -u "$DOCKER_USER" --password-stdin
                 '
             '''
           }
@@ -127,19 +129,20 @@ pipeline {
           sh '''
             set -e
 
-            ssh -p ${SSH_PORT} -o StrictHostKeyChecking=no \
+            ssh -p ${SSH_PORT} \
+              -o StrictHostKeyChecking=no \
+              -o UserKnownHostsFile=/dev/null \
               ${SSH_USER}@${SSH_HOST} \
               REGISTRY_HOST="${REGISTRY_HOST}" \
               IMAGE_REPO="${IMAGE_REPO}" \
               IMAGE_TAG="${IMAGE_TAG}" \
               'set -e
-               cd ${SSH_COMPOSE_DIR}
-               docker compose -f ${SSH_COMPOSE_FILE} pull
+               cd '"${SSH_COMPOSE_DIR}"'
+               docker compose -f '"${SSH_COMPOSE_FILE}"' pull
               '
           '''
         }
       }
-    }
 
   }
 }