diff --git a/charts/voucher/templates/deployment.yaml b/charts/voucher/templates/deployment.yaml
index 518a1c4af2..29ed6a3698 100644
--- a/charts/voucher/templates/deployment.yaml
+++ b/charts/voucher/templates/deployment.yaml
@@ -49,7 +49,7 @@ spec:
         - name: TRACING_SERVICE_NAME
           value: {{ .Values.voucher.tracingServiceName }}
         - name: PLATFORM_FEES_IN_PPM
-          value: {{ .Values.voucher.platformFeesInPpm }}
+          value: "{{ .Values.voucher.platformFeesInPpm }}"
         - name: NEXTAUTH_SECRET
           valueFrom:
             secretKeyRef: