diff --git a/charts/cert-manager/templates/webhook-deployment.yaml b/charts/cert-manager/templates/webhook-deployment.yaml
index 043c4b1..857cf35 100644
--- a/charts/cert-manager/templates/webhook-deployment.yaml
+++ b/charts/cert-manager/templates/webhook-deployment.yaml
@@ -15,6 +15,10 @@
   {{- end }}
 spec:
   replicas: {{ .Values.webhook.replicaCount }}
+  {{- /* The if statement below is equivalent to {{- if $value }} but will also return true for 0. */ -}}
+  {{- if not (has (quote .Values.global.revisionHistoryLimit) (list "" (quote ""))) }}
+  revisionHistoryLimit: {{ .Values.global.revisionHistoryLimit }}
+  {{- end }}
   selector:
     matchLabels:
       app.kubernetes.io/name: {{ include "webhook.name" . }}
@@ -39,11 +43,26 @@
       annotations:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- if and .Values.prometheus.enabled (not (or .Values.prometheus.servicemonitor.enabled .Values.prometheus.podmonitor.enabled)) }}
+      {{- if not .Values.webhook.podAnnotations }}
+      annotations:
+      {{- end }}
+        prometheus.io/path: "/metrics"
+        prometheus.io/scrape: 'true'
+        prometheus.io/port: '9402'
+      {{- end }}
     spec:
+      {{- if not .Values.webhook.serviceAccount.create }}
+      {{- with .Values.global.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- end }}
       serviceAccountName: {{ template "webhook.serviceAccountName" . }}
       {{- if hasKey .Values.webhook "automountServiceAccountToken" }}
       automountServiceAccountToken: {{ .Values.webhook.automountServiceAccountToken }}
       {{- end }}
+      enableServiceLinks: {{ .Values.webhook.enableServiceLinks }}
       {{- with .Values.global.priorityClassName }}
       priorityClassName: {{ . | quote }}
       {{- end }}
@@ -54,14 +73,16 @@
       {{- if .Values.webhook.hostNetwork }}
       hostNetwork: true
       {{- end }}
+      {{- if .Values.webhook.hostNetwork }}
+      dnsPolicy: ClusterFirstWithHostNet
+      {{- end }}
       containers:
         - name: {{ .Chart.Name }}-webhook
-          {{- with .Values.webhook.image }}
-          image: "{{- if .registry -}}{{ .registry }}/{{- end -}}{{ .repository }}{{- if (.digest) -}} @{{ .digest }}{{- else -}}:{{ default $.Chart.AppVersion .tag }} {{- end -}}"
-          {{- end }}
+          image: "{{ template "image" (tuple .Values.webhook.image $.Chart.AppVersion) }}"
           imagePullPolicy: {{ .Values.webhook.image.pullPolicy }}
           args:
-          {{- if .Values.global.logLevel }}
+          {{- /* The if statement below is equivalent to {{- if $value }} but will also return true for 0. */ -}}
+          {{- if not (has (quote .Values.global.logLevel) (list "" (quote ""))) }}
           - --v={{ .Values.global.logLevel }}
           {{- end }}
           {{- if .Values.webhook.config }}
@@ -71,8 +92,8 @@
           {{ if not $config.securePort -}}
           - --secure-port={{ .Values.webhook.securePort }}
           {{- end }}
-          {{- if .Values.featureGates }}
-          - --feature-gates={{ .Values.featureGates }}
+          {{- if .Values.webhook.featureGates }}
+          - --feature-gates={{ .Values.webhook.featureGates }}
           {{- end }}
           {{- $tlsConfig := default $config.tlsConfig "" }}
           {{ if or (not $config.tlsConfig) (and (not $tlsConfig.dynamic) (not $tlsConfig.filesystem) ) -}}
@@ -88,6 +109,9 @@
           {{- with .Values.webhook.extraArgs }}
           {{- toYaml . | nindent 10 }}
           {{- end }}
+          {{- if not .Values.prometheus.enabled }}
+          - --metrics-listen-address=0
+          {{- end }}
           ports:
           - name: https
             protocol: TCP
@@ -105,6 +129,11 @@
             {{- else }}
             containerPort: 6080
             {{- end }}
+          {{- if .Values.prometheus.enabled }}
+          - containerPort: 9402
+            name: http-metrics
+            protocol: TCP
+          {{- end }}
           livenessProbe:
             httpGet:
               path: /livez
@@ -142,6 +171,9 @@
             valueFrom:
               fieldRef:
                 fieldPath: metadata.namespace
+          {{- with .Values.webhook.extraEnv }}
+          {{- toYaml . | nindent 10 }}
+          {{- end }}
           {{- with .Values.webhook.resources }}
           resources:
             {{- toYaml . | nindent 12 }}
@@ -152,8 +184,8 @@
             - name: config
               mountPath: /var/cert-manager/config
             {{- end }}
-            {{- if .Values.webhook.volumeMounts }}
-            {{- toYaml .Values.webhook.volumeMounts | nindent 12 }}
+            {{- with .Values.webhook.volumeMounts }}
+            {{- toYaml . | nindent 12 }}
             {{- end }}
           {{- end }}
       {{- with .Values.webhook.nodeSelector }}
@@ -179,7 +211,7 @@
           configMap:
             name: {{ include "webhook.fullname" . }}
         {{- end }}
-        {{- if .Values.webhook.volumes }}
-        {{- toYaml .Values.webhook.volumes | nindent 8 }}
+        {{- with .Values.webhook.volumes }}
+        {{- toYaml . | nindent 8 }}
         {{- end }}
       {{- end }}