diff --git a/charts/esphome/templates/deployment.yaml b/charts/esphome/templates/deployment.yaml
index 328ec64..ebd0bd7 100644
--- a/charts/esphome/templates/deployment.yaml
+++ b/charts/esphome/templates/deployment.yaml
@@ -66,4 +66,8 @@ spec:
       volumes:
         - name: config
           persistentVolumeClaim:
+            {{- if not .Values.pvc.existingClaim }}
             claimName: {{ include "esphome.fullname" . }}-config
+            {{- else }}
+            claimName: {{ .Values.pvc.existingClaim }}
+            {{- end }}