diff --git a/charts/kube-prometheus-stack/Chart.yaml b/charts/kube-prometheus-stack/Chart.yaml
index a2e2f56fcd77..ed6bed0f0581 100644
--- a/charts/kube-prometheus-stack/Chart.yaml
+++ b/charts/kube-prometheus-stack/Chart.yaml
@@ -21,7 +21,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 51.9.1
+version: 51.9.2
 appVersion: v0.68.0
 kubeVersion: ">=1.19.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus
diff --git a/charts/kube-prometheus-stack/templates/thanos-ruler/ruler.yaml b/charts/kube-prometheus-stack/templates/thanos-ruler/ruler.yaml
index 6d8c12a93aa6..4a7d6b55daee 100644
--- a/charts/kube-prometheus-stack/templates/thanos-ruler/ruler.yaml
+++ b/charts/kube-prometheus-stack/templates/thanos-ruler/ruler.yaml
@@ -101,7 +101,8 @@ spec:
 {{- end }}
 {{- if .Values.thanosRuler.thanosRulerSpec.objectStorageConfig }}
   objectStorageConfig:
-{{ toYaml .Values.thanosRuler.thanosRulerSpec.objectStorageConfig | indent 4 }}
+    key: object-storage-configs.yaml
+    name: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
 {{- end }}
 {{- if .Values.thanosRuler.thanosRulerSpec.labels }}
   labels:
diff --git a/charts/kube-prometheus-stack/templates/thanos-ruler/secret.yaml b/charts/kube-prometheus-stack/templates/thanos-ruler/secret.yaml
index ede29be714cd..67206eeb3ffa 100644
--- a/charts/kube-prometheus-stack/templates/thanos-ruler/secret.yaml
+++ b/charts/kube-prometheus-stack/templates/thanos-ruler/secret.yaml
@@ -11,4 +11,7 @@ data:
 {{- if .Values.thanosRuler.thanosRulerSpec.alertmanagersConfig }}
   alertmanager-configs.yaml: {{ toYaml .Values.thanosRuler.thanosRulerSpec.alertmanagersConfig | b64enc | quote }}
 {{- end }}
+{{- if .Values.thanosRuler.thanosRulerSpec.objectStorageConfig }}
+  object-storage-configs.yaml: {{ toYaml .Values.thanosRuler.thanosRulerSpec.objectStorageConfig | b64enc | quote }}
+{{- end }}
 {{- end }}