update
diff --git a/charts/cert-manager/templates/servicemonitor.yaml b/charts/cert-manager/templates/servicemonitor.yaml
new file mode 100644
index 0000000..9d9e899
--- /dev/null
+++ b/charts/cert-manager/templates/servicemonitor.yaml
@@ -0,0 +1,45 @@
+{{- if and .Values.prometheus.enabled .Values.prometheus.servicemonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ template "cert-manager.fullname" . }}
+{{- if .Values.prometheus.servicemonitor.namespace }}
+  namespace: {{ .Values.prometheus.servicemonitor.namespace }}
+{{- else }}
+  namespace: {{ include "cert-manager.namespace" . }}
+{{- end }}
+  labels:
+    app: {{ include "cert-manager.name" . }}
+    app.kubernetes.io/name: {{ include "cert-manager.name" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/component: "controller"
+    {{- include "labels" . | nindent 4 }}
+    prometheus: {{ .Values.prometheus.servicemonitor.prometheusInstance }}
+    {{- with .Values.prometheus.servicemonitor.labels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+{{- if .Values.prometheus.servicemonitor.annotations }}
+  annotations:
+    {{- with .Values.prometheus.servicemonitor.annotations }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+{{- end }}
+spec:
+  jobLabel: {{ template "cert-manager.fullname" . }}
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: {{ template "cert-manager.name" . }}
+      app.kubernetes.io/instance: {{ .Release.Name }}
+      app.kubernetes.io/component: "controller"
+{{- if .Values.prometheus.servicemonitor.namespace }}
+  namespaceSelector:
+    matchNames:
+      - {{ include "cert-manager.namespace" . }}
+{{- end }}
+  endpoints:
+  - targetPort: {{ .Values.prometheus.servicemonitor.targetPort }}
+    path: {{ .Values.prometheus.servicemonitor.path }}
+    interval: {{ .Values.prometheus.servicemonitor.interval }}
+    scrapeTimeout: {{ .Values.prometheus.servicemonitor.scrapeTimeout }}
+    honorLabels: {{ .Values.prometheus.servicemonitor.honorLabels }}
+{{- end }}