diff --git a/Jenkinsfile b/Jenkinsfile
index 9ca3ca5..4138be3 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -5,7 +5,7 @@ REGISTRY = 'docker.thejimnicholson.com/jenkins'
 podTemplate(
   name: POD_LABEL,
   namespace: 'jenkins',
-  podRetention: always,
+  podRetention: 'always',
   containers: [
     containerTemplate(
       name: 'kaniko',