diff --git a/charts/mailu/Chart.lock b/charts/mailu/Chart.lock
index 007e1085..83e76e4b 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: 27.0.18
 - 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: sha256:80f49da51c5d7cff256d596a80be0f99bf8d36a4c70a755a6e86ba45e48420a7
+generated: "2026-07-30T17:33:13.430536915Z"
diff --git a/charts/mailu/Chart.yaml b/charts/mailu/Chart.yaml
index e79c70ac..267c9b70 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: 27.0.18
     repository: https://charts.bitnami.com/bitnami
   - condition: postgresql.enabled
     name: postgresql