diff --git a/templates/cronjob.yaml b/templates/cronjob.yaml
index 1ed239b..906d2b4 100644
--- a/templates/cronjob.yaml
+++ b/templates/cronjob.yaml
@@ -1,4 +1,8 @@
+{{- if semverCompare ">=1.21-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: batch/v1
+{{- else -}}
 apiVersion: batch/v1beta1
+{{- end }}
 kind: CronJob
 metadata:
   name: {{ include "postfixadmin-fetchmail.fullname" . }}