diff --git a/Jenkinsfile_docker b/Jenkinsfile_docker
index 184495d..24c8073 100644
--- a/Jenkinsfile_docker
+++ b/Jenkinsfile_docker
@@ -1,6 +1,6 @@
 pipeline {
 agent { 
-    dockerfile true 
+    docker { image 'ubuntu:latest' } 
 }
 stages {
     stage('Test') {