diff --git a/charts/prometheus-adapter/Chart.yaml b/charts/prometheus-adapter/Chart.yaml
index 175c6d080e18..5a3ca7bcf6f5 100644
--- a/charts/prometheus-adapter/Chart.yaml
+++ b/charts/prometheus-adapter/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v1
 name: prometheus-adapter
-version: 4.8.3
+version: 4.9.0
 appVersion: v0.11.2
 description: A Helm chart for k8s prometheus adapter
 home: https://github.com/kubernetes-sigs/prometheus-adapter
diff --git a/charts/prometheus-adapter/templates/psp.yaml b/charts/prometheus-adapter/templates/psp.yaml
index 3f3f79e542fa..ec26af502cb3 100644
--- a/charts/prometheus-adapter/templates/psp.yaml
+++ b/charts/prometheus-adapter/templates/psp.yaml
@@ -4,9 +4,9 @@ apiVersion: policy/v1beta1
 kind: PodSecurityPolicy
 metadata:
   name: {{ template "k8s-prometheus-adapter.fullname" . }}
-  {{- if .Values.customAnnotations }}
+  {{- with (merge .Values.customAnnotations .Values.psp.annotations) }}
   annotations:
-  {{- toYaml .Values.customAnnotations | nindent 4 }}
+    {{- toYaml . | nindent 4 }}
   {{- end }}
   labels:
     {{- include "k8s-prometheus-adapter.labels" . | indent 4 }}
diff --git a/charts/prometheus-adapter/values.yaml b/charts/prometheus-adapter/values.yaml
index b6527ca00caa..ab9aaeaa9650 100644
--- a/charts/prometheus-adapter/values.yaml
+++ b/charts/prometheus-adapter/values.yaml
@@ -66,6 +66,11 @@ rbac:
 psp:
   # Specifies whether PSP resources should be created
   create: false
+  # Annotations added to the pod security policy
+  annotations: {}
+  ## Ref: https://kubernetes.io/docs/concepts/policy/pod-security-policy/#apparmor
+  ## Ref: https://kubernetes.io/docs/concepts/policy/pod-security-policy/#seccomp
+  ## Ref: https://kubernetes.io/docs/concepts/policy/pod-security-policy/#sysctl
 
 serviceAccount:
   # Specifies whether a service account should be created