diff --git a/charts/victoria-metrics-alert/CHANGELOG.md b/charts/victoria-metrics-alert/CHANGELOG.md
index 1737aa7a3..dd1e0fa36 100644
--- a/charts/victoria-metrics-alert/CHANGELOG.md
+++ b/charts/victoria-metrics-alert/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Next release
 
 - Added ability to override deployment namespace using `namespaceOverride` and `global.namespaceOverride` variables
+- updated alertmanager args for IPv6 compatibility. See [this issue](https://github.com/VictoriaMetrics/helm-charts/issues/856)
 
 ## 0.11.0
 
diff --git a/charts/victoria-metrics-alert/README.md b/charts/victoria-metrics-alert/README.md
index 1dbe8d3f1..3114f6679 100644
--- a/charts/victoria-metrics-alert/README.md
+++ b/charts/victoria-metrics-alert/README.md
@@ -354,6 +354,16 @@ Prefix
 </td>
       <td></td>
     </tr>
+    <tr>
+      <td>alertmanager.initContainers</td>
+      <td>list</td>
+      <td><pre lang="plaintext">
+[]
+</pre>
+</td>
+      <td><p>Additional initContainers to initialize the pod</p>
+</td>
+    </tr>
     <tr>
       <td>alertmanager.listenAddress</td>
       <td>string</td>
diff --git a/charts/victoria-metrics-alert/templates/_helpers.tpl b/charts/victoria-metrics-alert/templates/_helpers.tpl
index 62d229186..8a7dfdfeb 100644
--- a/charts/victoria-metrics-alert/templates/_helpers.tpl
+++ b/charts/victoria-metrics-alert/templates/_helpers.tpl
@@ -237,7 +237,7 @@ http://{{- include "vmalert.alertmanager.fullname" . -}}:9093{{ .Values.alertman
   {{- $_ := set $args "storage.path" (ternary $app.persistentVolume.mountPath "/data" $app.persistentVolume.enabled) -}}
   {{- $_ := set $args "data.retention" $app.retention -}}
   {{- $_ := set $args "web.listen-address" $app.listenAddress -}}
-  {{- $_ := set $args "cluster.advertise-address" "$(POD_IP):6783" -}}
+  {{- $_ := set $args "cluster.advertise-address" "[$(POD_IP)]:6783" -}}
   {{- with $app.baseURL -}}
     {{- $_ := set $args "web.external-url" $app.baseURL -}}
   {{- end -}}
diff --git a/charts/victoria-metrics-alert/templates/alertmanager-configmap.yaml b/charts/victoria-metrics-alert/templates/alertmanager-configmap.yaml
index 3865ccd31..b7d9a69e0 100644
--- a/charts/victoria-metrics-alert/templates/alertmanager-configmap.yaml
+++ b/charts/victoria-metrics-alert/templates/alertmanager-configmap.yaml
@@ -4,13 +4,10 @@ kind: ConfigMap
 metadata:
   name: {{ include "vmalert.alertmanager.configname" .}}
   namespace: {{include "vm.namespace" .}}
-  labels: {{- include "vmalert.alertmanager.labels" . | nindent 4}}
+  labels: {{ include "vmalert.alertmanager.labels" . | nindent 4 }}
 data:
-  alertmanager.yaml: |
-    {{ toYaml .Values.alertmanager.config | nindent 4 }}
-
-{{- range $key, $value := .Values.alertmanager.templates }}
-  {{ $key }}: |-
-    {{- $value | nindent 4 }}
+  alertmanager.yaml: |{{ toYaml .Values.alertmanager.config | nindent 4 }}
+  {{- range $key, $value := .Values.alertmanager.templates }}
+  {{ $key }}: |{{ $value | nindent 4 }}
   {{- end }}
 {{- end }}
diff --git a/charts/victoria-metrics-alert/templates/alertmanager-deployment.yaml b/charts/victoria-metrics-alert/templates/alertmanager-deployment.yaml
index cb91fddff..7fcb412b0 100644
--- a/charts/victoria-metrics-alert/templates/alertmanager-deployment.yaml
+++ b/charts/victoria-metrics-alert/templates/alertmanager-deployment.yaml
@@ -33,6 +33,9 @@ spec:
       {{- with ($app.imagePullSecrets | default .Values.global.imagePullSecrets) }}
       imagePullSecrets: {{ toYaml . | nindent 8 }}
       {{- end }}
+      {{- with $app.initContainers }}
+      initContainers: {{ toYaml . | nindent 8 }}
+      {{- end }}
       containers:
         - name: alertmanager
           {{- if $app.securityContext.enabled }}
diff --git a/charts/victoria-metrics-alert/templates/alertmanager-service.yaml b/charts/victoria-metrics-alert/templates/alertmanager-service.yaml
index 68aab19a6..b1b92de66 100644
--- a/charts/victoria-metrics-alert/templates/alertmanager-service.yaml
+++ b/charts/victoria-metrics-alert/templates/alertmanager-service.yaml
@@ -5,8 +5,7 @@ kind: Service
 metadata:
   namespace: {{ include "vm.namespace" . }}
   {{- with $app.service.annotations }}
-  annotations:
-  {{- toYaml . | nindent 4 }}
+  annotations: {{ toYaml . | nindent 4 }}
   {{- end }}
   {{- $ctx := merge (deepCopy .) (dict "extraLabels" $app.service.labels) }}
   labels: {{ include "vmalert.alertmanager.labels" $ctx | nindent 4 }}
diff --git a/charts/victoria-metrics-alert/templates/clusterrolebinding.yaml b/charts/victoria-metrics-alert/templates/clusterrolebinding.yaml
index 782689c66..155eb8703 100644
--- a/charts/victoria-metrics-alert/templates/clusterrolebinding.yaml
+++ b/charts/victoria-metrics-alert/templates/clusterrolebinding.yaml
@@ -4,15 +4,13 @@ apiVersion: rbac.authorization.k8s.io/v1
 metadata:
   name: {{ include "vmalert.server.fullname" . }}-clusterrolebinding
   namespace: {{ include "vm.namespace" . }}
-  labels:
-  {{- include "vmalert.server.labels" . | nindent 4 }}
-{{- with .Values.rbac.extraLabels }}
-{{ toYaml . | indent 4}}
-{{- end }}
-{{- with .Values.rbac.annotations }}
-  annotations:
-{{ toYaml . | indent 4 }}
-{{- end }}
+  labels: {{ include "vmalert.server.labels" . | nindent 4 }}
+    {{- with .Values.rbac.extraLabels }}
+    {{- toYaml . | nindent 4}}
+    {{- end }}
+  {{- with .Values.rbac.annotations }}
+  annotations: {{ toYaml . | nindent 4 }}
+  {{- end }}
 subjects:
   - kind: ServiceAccount
     name: {{ include "vmalert.serviceAccountName" . }}
diff --git a/charts/victoria-metrics-alert/templates/server-deployment.yaml b/charts/victoria-metrics-alert/templates/server-deployment.yaml
index 3b47ecb33..6d04a12a4 100644
--- a/charts/victoria-metrics-alert/templates/server-deployment.yaml
+++ b/charts/victoria-metrics-alert/templates/server-deployment.yaml
@@ -43,8 +43,7 @@ spec:
       imagePullSecrets: {{ toYaml . | nindent 8 }}
       {{- end }}
       {{- with $app.initContainers }}
-      initContainers:
-        {{- toYaml . | nindent 8 }}
+      initContainers: {{ toYaml . | nindent 8 }}
       {{- end }}
       containers:
         - name: vmalert
diff --git a/charts/victoria-metrics-alert/templates/serviceaccount.yaml b/charts/victoria-metrics-alert/templates/serviceaccount.yaml
index f3df41358..a2501a4d2 100644
--- a/charts/victoria-metrics-alert/templates/serviceaccount.yaml
+++ b/charts/victoria-metrics-alert/templates/serviceaccount.yaml
@@ -4,10 +4,8 @@ kind: ServiceAccount
 metadata:
   name: {{ include "vmalert.serviceAccountName" . }}
   namespace: {{ include "vm.namespace" . }}
-  labels:
-    {{- include "vmalert.common.metaLabels" . | nindent 4 }}
+  labels: {{ include "vmalert.common.metaLabels" . | nindent 4 }}
   {{- with .Values.serviceAccount.annotations }}
-  annotations:
-    {{- toYaml . | nindent 4 }}
+  annotations: {{ toYaml . | nindent 4 }}
   {{- end }}
 {{- end -}}
diff --git a/charts/victoria-metrics-alert/templates/vpa.yaml b/charts/victoria-metrics-alert/templates/vpa.yaml
index f1d79c09d..1af2308d3 100644
--- a/charts/victoria-metrics-alert/templates/vpa.yaml
+++ b/charts/victoria-metrics-alert/templates/vpa.yaml
@@ -5,22 +5,17 @@ metadata:
   name: {{ include "vmalert.server.fullname" . }}
   namespace: {{ include "vm.namespace" . }}
 spec:
-  {{- if .Values.server.verticalPodAutoscaler.recommenders }}
-  recommenders:
-    {{- range .Values.server.verticalPodAutoscaler.recommenders }}
-    - name: {{ .name }}
-    {{- end }}
+  {{- with .Values.server.verticalPodAutoscaler.recommenders }}
+  recommenders: {{ toYaml . | nindent 4 }}
   {{- end }}
   targetRef:
     apiVersion: apps/v1
     kind: Deployment
     name: {{ include "vmalert.server.fullname" . }}
-  {{- if .Values.server.verticalPodAutoscaler.updatePolicy }}
-  updatePolicy:
-    {{- toYaml .Values.server.verticalPodAutoscaler.updatePolicy | nindent 4 }}
+  {{- with .Values.server.verticalPodAutoscaler.updatePolicy }}
+  updatePolicy: {{ toYaml . | nindent 4 }}
   {{- end }}
-  {{- if .Values.server.verticalPodAutoscaler.resourcePolicy }}
-  resourcePolicy:
-    {{- toYaml .Values.server.verticalPodAutoscaler.resourcePolicy | nindent 4 }}
+  {{- with .Values.server.verticalPodAutoscaler.resourcePolicy }}
+  resourcePolicy: {{ toYaml . | nindent 4 }}
   {{- end }}
 {{- end }}
diff --git a/charts/victoria-metrics-alert/values.yaml b/charts/victoria-metrics-alert/values.yaml
index 1ee2f8dc1..3b5d39a6a 100644
--- a/charts/victoria-metrics-alert/values.yaml
+++ b/charts/victoria-metrics-alert/values.yaml
@@ -484,6 +484,9 @@ alertmanager:
     #- name: config-reloader
     #  image: reloader-image
 
+  # -- Additional initContainers to initialize the pod
+  initContainers: []
+
 # -- Add extra specs dynamically to this chart
 extraObjects: []