diff --git a/charts/postgres-cluster/Chart.yaml b/charts/postgres-cluster/Chart.yaml
index ba5b2c7..e851f11 100644
--- a/charts/postgres-cluster/Chart.yaml
+++ b/charts/postgres-cluster/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v2
 name: postgres-cluster
-version: 2.4.0
+version: 2.4.1
 description: Chart for cloudnative-pg cluster
 keywords:
   - database
diff --git a/charts/postgres-cluster/templates/_helpers.tpl b/charts/postgres-cluster/templates/_helpers.tpl
index 401bf76..d766ace 100644
--- a/charts/postgres-cluster/templates/_helpers.tpl
+++ b/charts/postgres-cluster/templates/_helpers.tpl
@@ -75,7 +75,7 @@ Generate recovery server name
   {{- if .Values.recovery.recoveryServerName -}}
     {{- .Values.recovery.recoveryServerName -}}
   {{- else -}}
-    {{- printf "%s-backup-%s" (include "cluster.name" .) .Values.recovery.recoveryIndex | trunc 63 | trimSuffix "-" -}}
+    {{- printf "%s-backup-%s" (include "cluster.name" .) (toString .Values.recovery.recoveryIndex) | trunc 63 | trimSuffix "-" -}}
   {{- end }}
 {{- end }}