diff --git a/chart/plausible-analytics/templates/deployment.yaml b/chart/plausible-analytics/templates/deployment.yaml
index cb7c5ec..8b01c57 100644
--- a/chart/plausible-analytics/templates/deployment.yaml
+++ b/chart/plausible-analytics/templates/deployment.yaml
@@ -53,7 +53,7 @@ spec:
             - run
           env:
             - name: PORT
-              value: {{ .Values.service.port }}
+              value: {{ .Values.service.port | toString | quote }}
             {{- if .Values.adminUser.email }}
             - name: ADMIN_USER_EMAIL
               valueFrom: