diff --git a/helm/dev/cortex-prometheus-operator/Chart.yaml b/helm/dev/cortex-prometheus-operator/Chart.yaml
index 9c05d0fa0..90c8ef9ec 100644
--- a/helm/dev/cortex-prometheus-operator/Chart.yaml
+++ b/helm/dev/cortex-prometheus-operator/Chart.yaml
@@ -10,4 +10,4 @@ dependencies:
   # CRDs of the prometheus operator, such as PrometheusRule, ServiceMonitor, etc.
   - name: kube-prometheus-stack
     repository: oci://ghcr.io/prometheus-community/charts
-    version: 91.5.2
+    version: 91.8.2