diff --git a/charts/prometheus/Chart.yaml b/charts/prometheus/Chart.yaml
index b2e4c46907cc..3d5359ea600b 100644
--- a/charts/prometheus/Chart.yaml
+++ b/charts/prometheus/Chart.yaml
@@ -1,7 +1,7 @@
 apiVersion: v2
 name: prometheus
-appVersion: v2.55.1
-version: 25.30.2
+appVersion: v3.0.0
+version: 26.0.0
 kubeVersion: ">=1.19.0-0"
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/
diff --git a/charts/prometheus/README.md b/charts/prometheus/README.md
index 2cb744ce8f52..7dd51f4b4481 100644
--- a/charts/prometheus/README.md
+++ b/charts/prometheus/README.md
@@ -65,6 +65,11 @@ helm upgrade [RELEASE_NAME] prometheus-community/prometheus --install
 
 _See [helm upgrade](https://helm.sh/docs/helm/helm_upgrade/) for command documentation._
 
+### To 26.0
+
+This release changes default version of promethues to v3.0.0, See official [migration guide](https://prometheus.io/docs/prometheus/latest/migration/#prometheus-3-0-migration-guide
+) and [release notes](https://github.com/prometheus/prometheus/releases/tag/v3.0.0) for more details.
+
 ### To 25.0
 
 The `server.remoteRead[].url` and `server.remoteWrite[].url` fields now support templating. Allowing for `url` values such as `https://{{ .Release.Name }}.example.com`.
diff --git a/charts/prometheus/values.yaml b/charts/prometheus/values.yaml
index 2ce96ef652d2..a81d7a0a6fea 100644
--- a/charts/prometheus/values.yaml
+++ b/charts/prometheus/values.yaml
@@ -60,7 +60,7 @@ configmapReload:
     ##
     image:
       repository: quay.io/prometheus-operator/prometheus-config-reloader
-      tag: v0.78.1
+      tag: v0.78.2
       # When digest is set to a non-empty value, images will be pulled by digest (regardless of tag value).
       digest: ""
       pullPolicy: IfNotPresent