diff --git a/docs/_releasenotes/2078.BREAKING.kube-prometheus-stack-updated-to-76.5.1 b/docs/_releasenotes/2078.BREAKING.kube-prometheus-stack-updated-to-76.5.1
new file mode 100644
index 0000000000000000000000000000000000000000..5c68cb2b89c4cadaf5ab7ad538a8ce3218784f76
--- /dev/null
+++ b/docs/_releasenotes/2078.BREAKING.kube-prometheus-stack-updated-to-76.5.1
@@ -0,0 +1 @@
+Updated default version of helm chart kube-prometheus-stack of https://github.com/prometheus-community/helm-charts from 73.2.3 to 76.5.1
diff --git a/docs/user/reference/options/yk8s.k8s-service-layer.prometheus.rst b/docs/user/reference/options/yk8s.k8s-service-layer.prometheus.rst
index e38e629ebe2c29f7f995a8cf4fffc400001d5ca5..8d4e101278aa2409d7e5707eafc028732a34c8b6 100644
--- a/docs/user/reference/options/yk8s.k8s-service-layer.prometheus.rst
+++ b/docs/user/reference/options/yk8s.k8s-service-layer.prometheus.rst
@@ -1493,7 +1493,7 @@ If the version shall be unpinned, set to: ``null``.
 
 **Default:**::
 
-  "73.2.3"
+  "76.5.1"
 
 
 **Example:**::
diff --git a/nix/yk8s/k8s-supplements/monitoring.nix b/nix/yk8s/k8s-supplements/monitoring.nix
index b9985825bfdfe8dc024add160d1b427b69c0cb18..0babd6cd3893d734b24e3611fb8f348aa6b1ba10 100644
--- a/nix/yk8s/k8s-supplements/monitoring.nix
+++ b/nix/yk8s/k8s-supplements/monitoring.nix
@@ -283,7 +283,7 @@ in {
     };
     prometheus_stack_version = mkHelmChartVersionOption {
       # renovate: datasource=helm depName=kube-prometheus-stack registryUrl=https://prometheus-community.github.io/helm-charts
-      default = "73.2.3";
+      default = "76.5.1";
     };
     prometheus_adapter_version = mkHelmChartVersionOption {
       # renovate: datasource=helm depName=prometheus-adapter registryUrl=https://prometheus-community.github.io/helm-charts