diff --git a/stable/prometheus-operator/Chart.yaml b/stable/prometheus-operator/Chart.yaml
index f3f8e3af81..c2c5bcf2c0 100644
--- a/stable/prometheus-operator/Chart.yaml
+++ b/stable/prometheus-operator/Chart.yaml
@@ -10,7 +10,7 @@ name: prometheus-operator
 sources:
   - https://github.com/coreos/prometheus-operator
   - https://coreos.com/operators/prometheus
-version: 6.12.1
+version: 6.13.0
 appVersion: 0.32.0
 home: https://github.com/coreos/prometheus-operator
 keywords:
diff --git a/stable/prometheus-operator/README.md b/stable/prometheus-operator/README.md
index abf19717bd..2abe3d57d4 100644
--- a/stable/prometheus-operator/README.md
+++ b/stable/prometheus-operator/README.md
@@ -336,6 +336,7 @@ The following tables list the configurable parameters of the prometheus-operator
 | `alertmanager.podDisruptionBudget.enabled` | If true, create a pod disruption budget for Alertmanager pods. The created resource cannot be modified once created - it must be deleted to perform a change | `false` |
 | `alertmanager.podDisruptionBudget.maxUnavailable` | Maximum number / percentage of pods that may be made unavailable | `""` |
 | `alertmanager.podDisruptionBudget.minAvailable` | Minimum number / percentage of pods that should remain scheduled | `1` |
+| `alertmanager.secret.annotations` | Alertmanager Secret annotations | `{}` |
 | `alertmanager.service.annotations` | Alertmanager Service annotations | `{}` |
 | `alertmanager.service.clusterIP` | Alertmanager service clusterIP IP | `""` |
 | `alertmanager.service.externalIPs` | List of IP addresses at which the Alertmanager server service is available | `[]` |
diff --git a/stable/prometheus-operator/ci/test-values.yaml b/stable/prometheus-operator/ci/test-values.yaml
index 89a0c16014..50be0387a3 100644
--- a/stable/prometheus-operator/ci/test-values.yaml
+++ b/stable/prometheus-operator/ci/test-values.yaml
@@ -170,6 +170,11 @@ alertmanager:
     #   hosts:
     #   - alertmanager.example.com
 
+  ## Configuration for Alertmanager secret
+  ##
+  secret:
+    annotations: {}
+
   ## Configuration for Alertmanager service
   ##
   service:
diff --git a/stable/prometheus-operator/templates/alertmanager/secret.yaml b/stable/prometheus-operator/templates/alertmanager/secret.yaml
index f7563772d9..f12e77f906 100644
--- a/stable/prometheus-operator/templates/alertmanager/secret.yaml
+++ b/stable/prometheus-operator/templates/alertmanager/secret.yaml
@@ -3,6 +3,10 @@ apiVersion: v1
 kind: Secret
 metadata:
   name: alertmanager-{{ template "prometheus-operator.fullname" . }}-alertmanager
+{{- if .Values.alertmanager.secret.annotations }}
+  annotations:
+{{ toYaml .Values.alertmanager.secret.annotations | indent 4 }}
+{{- end }}
   labels:
     app: {{ template "prometheus-operator.name" . }}-alertmanager
 {{ include "prometheus-operator.labels" . | indent 4 }}
diff --git a/stable/prometheus-operator/values.yaml b/stable/prometheus-operator/values.yaml
index 13aa0561bf..0f450727b5 100644
--- a/stable/prometheus-operator/values.yaml
+++ b/stable/prometheus-operator/values.yaml
@@ -170,6 +170,11 @@ alertmanager:
     #   hosts:
     #   - alertmanager.example.com
 
+  ## Configuration for Alertmanager secret
+  ##
+  secret:
+    annotations: {}
+
   ## Configuration for Alertmanager service
   ##
   service: