diff --git a/stable/prometheus-operator/Chart.yaml b/stable/prometheus-operator/Chart.yaml
index 097859931b..0f2b91b121 100644
--- a/stable/prometheus-operator/Chart.yaml
+++ b/stable/prometheus-operator/Chart.yaml
@@ -12,7 +12,7 @@ sources:
   - https://github.com/coreos/kube-prometheus
   - https://github.com/coreos/prometheus-operator
   - https://coreos.com/operators/prometheus
-version: 8.13.12
+version: 8.13.13
 appVersion: 0.38.1
 tillerVersion: ">=2.12.0"
 home: https://github.com/coreos/prometheus-operator
diff --git a/stable/prometheus-operator/README.md b/stable/prometheus-operator/README.md
index 4add3463d0..ae1c5439e8 100644
--- a/stable/prometheus-operator/README.md
+++ b/stable/prometheus-operator/README.md
@@ -326,6 +326,8 @@ The following tables list the configurable parameters of the prometheus-operator
 | `prometheus.prometheusSpec.storageSpec` | Storage spec to specify how storage shall be used. | `{}` |
 | `prometheus.prometheusSpec.thanos` | Thanos configuration allows configuring various aspects of a Prometheus server in a Thanos environment. This section is experimental, it may change significantly without deprecation notice in any release.This is experimental and may change significantly without backward compatibility in any release. See https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#thanosspec | `{}` |
 | `prometheus.prometheusSpec.tolerations` | If specified, the pod's tolerations. | `[]` |
+| `prometheus.prometheusSpec.volumes` | Additional Volumes on the output StatefulSet definition. | `[]` |
+| `prometheus.prometheusSpec.volumeMounts` | Additional VolumeMounts on the output StatefulSet definition. | `[]` |
 | `prometheus.service.additionalPorts` |  Additional Prometheus Service ports to add for NodePort service type | `[]` |
 | `prometheus.service.annotations` |  Prometheus Service Annotations | `{}` |
 | `prometheus.service.clusterIP` | Prometheus service clusterIP IP | `""` |
diff --git a/stable/prometheus-operator/templates/prometheus/prometheus.yaml b/stable/prometheus-operator/templates/prometheus/prometheus.yaml
index 8b456b6175..ea67da3cce 100644
--- a/stable/prometheus-operator/templates/prometheus/prometheus.yaml
+++ b/stable/prometheus-operator/templates/prometheus/prometheus.yaml
@@ -239,3 +239,11 @@ spec:
 {{- if .Values.prometheus.prometheusSpec.enforcedNamespaceLabel }}
   enforcedNamespaceLabel: {{ .Values.prometheus.prometheusSpec.enforcedNamespaceLabel }}
 {{- end }}
+{{- if .Values.prometheus.prometheusSpec.volumes }}
+  volumes:
+{{ toYaml .Values.prometheus.prometheusSpec.volumes | indent 4 }}
+{{- end }}
+{{- if .Values.prometheus.prometheusSpec.volumeMounts }}
+  volumeMounts:
+{{ toYaml .Values.prometheus.prometheusSpec.volumeMounts | indent 4 }}
+{{- end }}
diff --git a/stable/prometheus-operator/values.yaml b/stable/prometheus-operator/values.yaml
index d54ff6b2eb..241b5797f4 100644
--- a/stable/prometheus-operator/values.yaml
+++ b/stable/prometheus-operator/values.yaml
@@ -1778,6 +1778,11 @@ prometheus:
     #          storage: 50Gi
     #    selector: {}
 
+    # Additional volumes on the output StatefulSet definition.
+    volumes: []
+    # Additional VolumeMounts on the output StatefulSet definition.
+    volumeMounts: []
+
     ## AdditionalScrapeConfigs allows specifying additional Prometheus scrape configurations. Scrape configurations
     ## are appended to the configurations generated by the Prometheus Operator. Job configurations must have the form
     ## as specified in the official Prometheus documentation: