diff --git a/stable/prometheus-operator/README.md b/stable/prometheus-operator/README.md
index dcab697a61..1c6fbc1a6d 100644
--- a/stable/prometheus-operator/README.md
+++ b/stable/prometheus-operator/README.md
@@ -253,8 +253,8 @@ The following tables lists the configurable parameters of the prometheus-operato
 | `kubeDns.service.selector` | CoreDns service selector | `{"k8s-app" : "kube-dns" }` |
 | `kubeEtcd.enabled` | Deploy components to scrape etcd | `true` |
 | `kubeEtcd.endpoints` | Endpoints where etcd runs. Provide this if running etcd outside the cluster | `[]` |
-| `kubeEtcd.service.port` | Etct port | `4001` |
-| `kubeEtcd.service.targetPort` | Etct targetPort | `4001` |
+| `kubeEtcd.service.port` | Etcd port | `4001` |
+| `kubeEtcd.service.targetPort` | Etcd targetPort | `4001` |
 | `kubeEtcd.service.selector` | Selector for etcd if running inside the cluster | `{"k8s-app":"etcd-server"}` |
 | `kubeEtcd.servicemonitor.scheme` | Etcd servicemonitor scheme | `http` |
 | `kubeEtcd.servicemonitor.insecureSkipVerify` | Skip validating etcd TLS certificate when scraping | `false` |
diff --git a/stable/prometheus-operator/ci/test-values.yaml b/stable/prometheus-operator/ci/test-values.yaml
index f8bcd8ab16..02ee6f0a78 100644
--- a/stable/prometheus-operator/ci/test-values.yaml
+++ b/stable/prometheus-operator/ci/test-values.yaml
@@ -6,7 +6,7 @@
 ##
 nameOverride: ""
 
-## Provide a name to substitue for the full names of resources
+## Provide a name to substitute for the full names of resources
 ##
 fullnameOverride: ""
 
diff --git a/stable/prometheus-operator/hack/sync_grafana_dashboards.py b/stable/prometheus-operator/hack/sync_grafana_dashboards.py
index f548d0b7a3..2a43c15df2 100755
--- a/stable/prometheus-operator/hack/sync_grafana_dashboards.py
+++ b/stable/prometheus-operator/hack/sync_grafana_dashboards.py
@@ -35,11 +35,6 @@ charts = [
         'destination': '../templates/grafana/dashboards',
         'type': 'json',
     },
-    {
-        'source': 'https://raw.githubusercontent.com/helm/charts/master/stable/prometheus-operator/dashboards/grafana-coredns-k8s.json',
-        'destination': '../templates/grafana/dashboards',
-        'type': 'json',
-    },
 ]
 
 # Additional conditions map
@@ -119,7 +114,11 @@ def main():
     # read the rules, create a new template file per group
     for chart in charts:
         print("Generating rules from %s" % chart['source'])
-        raw_text = requests.get(chart['source']).text
+        response = requests.get(chart['source'])
+        if response.status_code != 200:
+            print('Skipping the file, response code %s not equals 200' % response.status_code)
+            continue
+        raw_text = response.text
         if chart['type'] == 'yaml':
             yaml_text = yaml.load(raw_text)
             groups = yaml_text['items']
diff --git a/stable/prometheus-operator/hack/sync_prometheus_rules.py b/stable/prometheus-operator/hack/sync_prometheus_rules.py
index 76242923fa..bc5aa0415b 100755
--- a/stable/prometheus-operator/hack/sync_prometheus_rules.py
+++ b/stable/prometheus-operator/hack/sync_prometheus_rules.py
@@ -28,11 +28,10 @@ charts = [
         'source': 'https://raw.githubusercontent.com/coreos/prometheus-operator/master/contrib/kube-prometheus/manifests/prometheus-rules.yaml',
         'destination': '../templates/alertmanager/rules'
     },
-    # don't uncomment until https://github.com/etcd-io/etcd/pull/10244 is merged
-    # {
-    #     'source': 'https://raw.githubusercontent.com/etcd-io/etcd/master/Documentation/op-guide/etcd3_alert.rules.yml',
-    #     'destination': '../templates/alertmanager/rules'
-    # },
+    {
+        'source': 'https://raw.githubusercontent.com/etcd-io/etcd/master/Documentation/op-guide/etcd3_alert.rules.yml',
+        'destination': '../templates/alertmanager/rules'
+    },
 ]
 
 # Additional conditions map
@@ -185,7 +184,11 @@ def main():
     # read the rules, create a new template file per group
     for chart in charts:
         print("Generating rules from %s" % chart['source'])
-        raw_text = requests.get(chart['source']).text
+        response = requests.get(chart['source'])
+        if response.status_code != 200:
+            print('Skipping the file, response code %s not equals 200' % response.status_code)
+            continue
+        raw_text = response.text
         yaml_text = yaml.load(raw_text)
         # etcd workaround, their file don't have spec level
         groups = yaml_text['spec']['groups'] if yaml_text.get('spec') else yaml_text['groups']
diff --git a/stable/prometheus-operator/templates/alertmanager/rules/etcd.yaml b/stable/prometheus-operator/templates/alertmanager/rules/etcd.yaml
index dd0140dbba..80800f7ff8 100644
--- a/stable/prometheus-operator/templates/alertmanager/rules/etcd.yaml
+++ b/stable/prometheus-operator/templates/alertmanager/rules/etcd.yaml
@@ -1,4 +1,4 @@
-# Generated from 'etcd' group from https://raw.githubusercontent.com/paskal/etcd/master/Documentation/op-guide/etcd3_alert.rules.yml
+# Generated from 'etcd' group from https://raw.githubusercontent.com/etcd-io/etcd/master/Documentation/op-guide/etcd3_alert.rules.yml
 {{- if and .Values.defaultRules.create .Values.kubeEtcd.enabled }}
 apiVersion: {{ printf "%s/v1" (.Values.prometheusOperator.crdApiGroup | default "monitoring.coreos.com") }}
 kind: PrometheusRule
diff --git a/stable/prometheus-operator/templates/grafana/dashboards/grafana-coredns-k8s.yaml b/stable/prometheus-operator/templates/grafana/dashboards/grafana-coredns-k8s.yaml
index c7f3039310..bd6306d94a 100644
--- a/stable/prometheus-operator/templates/grafana/dashboards/grafana-coredns-k8s.yaml
+++ b/stable/prometheus-operator/templates/grafana/dashboards/grafana-coredns-k8s.yaml
@@ -1,4 +1,4 @@
-# Generated from 'grafana-coredns-k8s' from https://raw.githubusercontent.com/helm/charts/master/stable/prometheus-operator/dashboards/grafana-coredns-k8s.json
+# Added manually, should be changed in-place.
 {{- if and .Values.grafana.enabled .Values.grafana.defaultDashboardsEnabled .Values.coreDns.enabled }}
 apiVersion: v1
 kind: ConfigMap
diff --git a/stable/prometheus-operator/values.yaml b/stable/prometheus-operator/values.yaml
index ecf931c212..e2d054589b 100644
--- a/stable/prometheus-operator/values.yaml
+++ b/stable/prometheus-operator/values.yaml
@@ -6,7 +6,7 @@
 ##
 nameOverride: ""
 
-## Provide a name to substitue for the full names of resources
+## Provide a name to substitute for the full names of resources
 ##
 fullnameOverride: ""