diff --git a/charts/pv-resizer/v0.1.0/templates/_helpers.tpl b/charts/pv-resizer/v0.1.0/templates/_helpers.tpl
index 476a1e4..954205f 100644
--- a/charts/pv-resizer/v0.1.0/templates/_helpers.tpl
+++ b/charts/pv-resizer/v0.1.0/templates/_helpers.tpl
@@ -60,3 +60,15 @@ Create the name of the service account to use
 {{- default "default" .Values.serviceAccount.name }}
 {{- end }}
 {{- end }}
+
+{{/*
+Select the CronJob API version supported by the target cluster.
+Prefer batch/v1 and fall back to batch/v1beta1 for older Kubernetes versions.
+*/}}
+{{- define "pv-resizer.cronjob.apiVersion" -}}
+{{- if semverCompare ">=1.21-0" .Capabilities.KubeVersion.Version -}}
+batch/v1
+{{- else -}}
+batch/v1beta1
+{{- end -}}
+{{- end }}
diff --git a/charts/pv-resizer/v0.1.0/templates/cronjob.yaml b/charts/pv-resizer/v0.1.0/templates/cronjob.yaml
index 79692d4..c7ca9b4 100644
--- a/charts/pv-resizer/v0.1.0/templates/cronjob.yaml
+++ b/charts/pv-resizer/v0.1.0/templates/cronjob.yaml
@@ -1,4 +1,4 @@
-apiVersion: batch/v1beta1
+apiVersion: {{ include "pv-resizer.cronjob.apiVersion" . }}
 kind: CronJob
 metadata:
   name: {{ include "pv-resizer.fullname" . }}