diff --git a/Jenkinsfile b/Jenkinsfile
index 5e9be22..a1a80f9 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -14,7 +14,7 @@ pipeline {
       }
       stage('sh: Shell Script') {
          steps {
-            sh chmod +x ./shell_script.sh
+            sh('chmod +x ./shell_script.sh')
             sh('./shell_script.sh')
          }
       }