diff --git a/charts/mailu/Chart.lock b/charts/mailu/Chart.lock
index 007e1085..f329a84c 100644
--- a/charts/mailu/Chart.lock
+++ b/charts/mailu/Chart.lock
@@ -1,12 +1,12 @@
 dependencies:
 - name: redis
   repository: https://charts.bitnami.com/bitnami
-  version: 22.0.7
+  version: 25.5.2
 - name: postgresql
   repository: https://charts.bitnami.com/bitnami
   version: 16.7.27
 - name: mariadb
   repository: https://charts.bitnami.com/bitnami
   version: 22.0.0
-digest: sha256:281a64cc591c02586a4ef68228f19de0968514b3946477e7fc5db32f3eca0672
-generated: "2025-11-16T20:41:17.136901+01:00"
+digest: sha256:262afda5d86a13b95d0c26628803583b258f4894ec31b83f03cf786f627f051d
+generated: "2026-05-07T13:57:00.084237Z"
diff --git a/charts/mailu/Chart.yaml b/charts/mailu/Chart.yaml
index 8202003f..84aeba61 100644
--- a/charts/mailu/Chart.yaml
+++ b/charts/mailu/Chart.yaml
@@ -25,7 +25,7 @@ maintainers:
 dependencies:
   - condition: redis.enabled
     name: redis
-    version: 22.0.7
+    version: 25.5.2
     repository: https://charts.bitnami.com/bitnami
   - condition: postgresql.enabled
     name: postgresql