diff --git a/charts/flagger/README.md b/charts/flagger/README.md
index 631ed472..be25d3d1 100644
--- a/charts/flagger/README.md
+++ b/charts/flagger/README.md
@@ -90,7 +90,7 @@ The [configuration](#configuration) section lists the parameters that can be con
 To uninstall/delete the `flagger` deployment:
 
 ```console
-$ helm delete --purge flagger
+$ helm delete flagger
 ```
 
 The command removes all the Kubernetes components associated with the chart and deletes the release.
@@ -105,8 +105,9 @@ Parameter | Description | Default
 `image.tag` | Image tag | `<VERSION>`
 `image.pullPolicy` | Image pull policy | `IfNotPresent`
 `logLevel` | Log level | `info`
-`prometheus.install` | If `true`, installs Prometheus configured to scrape all pods in the custer including the App Mesh sidecar | `false`
 `metricsServer` | Prometheus URL, used when `prometheus.install` is `false` | `http://prometheus.istio-system:9090`
+`prometheus.install` | If `true`, installs Prometheus configured to scrape all pods in the custer | `false`
+`prometheus.retention` |  Prometheus data retention | `2h`
 `selectorLabels` | List of labels that Flagger uses to create pod selectors | `app,name,app.kubernetes.io/name`
 `configTracking.enabled` | If `true`, flagger will track changes in Secrets and ConfigMaps referenced in the target deployment | `true`
 `eventWebhook` | If set, Flagger will publish events to the given webhook | None
diff --git a/charts/flagger/templates/prometheus.yaml b/charts/flagger/templates/prometheus.yaml
index 467797c3..287d7f40 100644
--- a/charts/flagger/templates/prometheus.yaml
+++ b/charts/flagger/templates/prometheus.yaml
@@ -233,7 +233,7 @@ spec:
           image: {{ .Values.prometheus.image }}
           imagePullPolicy: IfNotPresent
           args:
-            - '--storage.tsdb.retention=2h'
+            - '--storage.tsdb.retention={{ .Values.prometheus.retention }}'
             - '--config.file=/etc/prometheus/prometheus.yml'
           ports:
             - containerPort: 9090
diff --git a/charts/flagger/values.yaml b/charts/flagger/values.yaml
index 15d94bfc..d7ce7978 100644
--- a/charts/flagger/values.yaml
+++ b/charts/flagger/values.yaml
@@ -121,7 +121,8 @@ tolerations: []
 prometheus:
   # to be used with ingress controllers
   install: false
-  image: docker.io/prom/prometheus:v2.18.1
+  image: docker.io/prom/prometheus:v2.19.0
+  retention: 2h
 
 #  Istio multi-cluster service mesh (shared control plane single-network)
 # https://istio.io/docs/setup/install/multicluster/shared-vpn/
diff --git a/kustomize/base/prometheus/deployment.yaml b/kustomize/base/prometheus/deployment.yaml
index 407840f1..2cdbff5b 100644
--- a/kustomize/base/prometheus/deployment.yaml
+++ b/kustomize/base/prometheus/deployment.yaml
@@ -19,7 +19,7 @@ spec:
       serviceAccountName: flagger-prometheus
       containers:
           - name: prometheus
-            image: prom/prometheus:v2.18.1
+            image: prom/prometheus:v2.19.0
             imagePullPolicy: IfNotPresent
             args:
               - '--storage.tsdb.retention=2h'