diff --git a/Jenkinsfile b/Jenkinsfile
index d3ac5de..4411608 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -25,9 +25,9 @@ pipeline {
             steps {
                 script {
                     withCredentials([usernamePassword(credentialsId: 'docker-hub', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
-                        sh("docker build -t nanajanashia/demo-app:jma-2.0 .")
-                        sh("echo $PASS | docker login -u $USER --password-stdin")
-                        sh("docker push nanajanashia/demo-app:jma-2.0")
+                        sh 'docker build -t nanajanashia/demo-app:jma-2.0 .'
+                        sh "echo $PASS | docker login -u $USER --password-stdin"
+                        sh 'docker push nanajanashia/demo-app:jma-2.0'
                     }
                 }
             }