diff --git a/stable/redis/Chart.yaml b/stable/redis/Chart.yaml
index a30a870856..87a0999dd8 100644
--- a/stable/redis/Chart.yaml
+++ b/stable/redis/Chart.yaml
@@ -1,5 +1,5 @@
 name: redis
-version: 4.2.8
+version: 4.2.9
 appVersion: 4.0.11
 description: Open source, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.
 keywords:
diff --git a/stable/redis/templates/redis-slave-deployment.yaml b/stable/redis/templates/redis-slave-deployment.yaml
index d587f55fc4..b5afd18831 100644
--- a/stable/redis/templates/redis-slave-deployment.yaml
+++ b/stable/redis/templates/redis-slave-deployment.yaml
@@ -9,6 +9,10 @@ metadata:
     release: "{{ .Release.Name }}"
     heritage: "{{ .Release.Service }}"
 spec:
+{{- if .Values.slave.updateStrategy }}
+  strategy:
+{{ toYaml .Values.slave.updateStrategy | indent 4 }}
+{{- end }}
 {{- if .Values.cluster.slaveCount }}
   replicas: {{ .Values.cluster.slaveCount }}
 {{- end }}
diff --git a/stable/redis/values.yaml b/stable/redis/values.yaml
index f0ee04db25..0ceb1f17a0 100644
--- a/stable/redis/values.yaml
+++ b/stable/redis/values.yaml
@@ -245,6 +245,10 @@ slave:
   # extraFlags: []
   ## Comma-separated list of Redis commands to disable
   # disableCommands: ""
+  ## deployment update stategy
+  # updateStrategy:
+  #   rollingUpdate:
+  #     maxUnavailable: 0
 
   ## Redis Slave pod/node affinity/anti-affinity
   ##