diff --git a/charts/argo-cd/Chart.yaml b/charts/argo-cd/Chart.yaml
index d249ec29..339b47fd 100644
--- a/charts/argo-cd/Chart.yaml
+++ b/charts/argo-cd/Chart.yaml
@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: v2.4.12
 description: A Helm chart for Argo CD, a declarative, GitOps continuous delivery tool for Kubernetes.
 name: argo-cd
-version: 5.5.0
+version: 5.5.1
 home: https://github.com/argoproj/argo-helm
 icon: https://argo-cd.readthedocs.io/en/stable/assets/logo.png
 keywords:
@@ -19,6 +19,4 @@ dependencies:
     condition: redis-ha.enabled
 annotations:
   artifacthub.io/changes: |
-    - "[Added]: New configuration section `configs.params` for command line parameters"
-    - "[Deprecated]: Command line arguments in `args` sections"
-    - "[Deprecated]: Options `logFormat` and `logLevel` for core components"
+    - "[Added]: REDIS_USERNAME environment variable added automatically based on externalRedis.username"
diff --git a/charts/argo-cd/README.md b/charts/argo-cd/README.md
index a5ffd5db..0117b4ad 100644
--- a/charts/argo-cd/README.md
+++ b/charts/argo-cd/README.md
@@ -852,6 +852,7 @@ If you want to use an existing Redis (eg. a managed service from a cloud provide
 | externalRedis.password | string | `""` | External Redis password |
 | externalRedis.port | int | `6379` | External Redis server port |
 | externalRedis.secretAnnotations | object | `{}` | External Redis Secret annotations |
+| externalRedis.username | string | `""` | External Redis username |
 
 ## ApplicationSet
 
diff --git a/charts/argo-cd/templates/argocd-configs/externalredis-secret.yaml b/charts/argo-cd/templates/argocd-configs/externalredis-secret.yaml
index a55044ba..80dfc475 100644
--- a/charts/argo-cd/templates/argocd-configs/externalredis-secret.yaml
+++ b/charts/argo-cd/templates/argocd-configs/externalredis-secret.yaml
@@ -1,4 +1,4 @@
-{{- if and .Values.externalRedis.password (not .Values.externalRedis.existingSecret) }}
+{{- if and (or .Values.externalRedis.username .Values.externalRedis.password) (not .Values.externalRedis.existingSecret) }}
 apiVersion: v1
 kind: Secret
 metadata:
@@ -13,5 +13,10 @@ metadata:
   {{- end }}
 type: Opaque
 data:
-  redis-password: {{ .Values.externalRedis.password | b64enc }}
+  {{- with .Values.externalRedis.username }}
+  redis-username: {{ . | b64enc }}
+  {{- end }}
+  {{- with .Values.externalRedis.password }}
+  redis-password: {{ . | b64enc }}
+  {{- end }}
 {{- end }}
diff --git a/charts/argo-cd/values.yaml b/charts/argo-cd/values.yaml
index cc1da0e0..82560619 100755
--- a/charts/argo-cd/values.yaml
+++ b/charts/argo-cd/values.yaml
@@ -1089,6 +1089,8 @@ redis-ha:
 externalRedis:
   # -- External Redis server host
   host: ""
+  # -- External Redis username
+  username: ""
   # -- External Redis password
   password: ""
   # -- External Redis server port