diff --git a/argocd/prometheus/templates/pv.yaml b/argocd/prometheus/templates/pv.yaml
index c9b3dda..0f51e96 100644
--- a/argocd/prometheus/templates/pv.yaml
+++ b/argocd/prometheus/templates/pv.yaml
@@ -1,4 +1,4 @@
-{{- range $index, $e := until .Values.prometheus.replicas }}
+{{- range $index, $e := until (.Values.prometheus.replicas | int) }}
 apiVersion: v1
 kind: PersistentVolume
 metadata: