diff --git a/src/com/example/DockerBuilder.groovy b/src/com/example/DockerBuilder.groovy
index 300d5ad..5f7efcd 100644
--- a/src/com/example/DockerBuilder.groovy
+++ b/src/com/example/DockerBuilder.groovy
@@ -10,6 +10,6 @@ class DockerBuilder {
             "docker login http://${dockerRepo} -u ${nexusUser} -p ${nexusPass}",
             "docker tag ${imageName} ${dockerRepo}/my-docker-repo/${imageName}:latest",
             "docker push ${dockerRepo}/my-docker-repo/${imageName}:latest"
-        ]
+        ].collect { it.toString() }
     }
 }