diff --git a/helm-charts/stage/templates/deployment.yaml b/helm-charts/stage/templates/deployment.yaml
index c74b376..1a3e157 100644
--- a/helm-charts/stage/templates/deployment.yaml
+++ b/helm-charts/stage/templates/deployment.yaml
@@ -36,7 +36,7 @@ spec:
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           env:
             - name: ROUTER_PREFIX
-              value: {{ .Values.ontime.prefix}}
+              value: {{ .Values.ontime.prefix | quote}}
           ports:
             - name: http
               containerPort: {{ .Values.service.port }}