diff --git a/pretix-helm/Chart.lock b/pretix-helm/Chart.lock
index e665f56..ab1cb2c 100644
--- a/pretix-helm/Chart.lock
+++ b/pretix-helm/Chart.lock
@@ -4,6 +4,6 @@ dependencies:
   version: 15.1.2
 - name: redis
   repository: https://charts.bitnami.com/bitnami
-  version: 19.0.1
-digest: sha256:e522409698486fdf3d11b5bdb2b8225a1b3e41175e239c81226079a57a40043f
-generated: "2024-03-23T20:46:39.245636+01:00"
+  version: 21.2.3
+digest: sha256:a1e165f5a54c8298817c997ec21d2d0dec05519463bb34a2ccb10f8476bea80c
+generated: "2025-06-13T00:16:06.086154645Z"
diff --git a/pretix-helm/Chart.yaml b/pretix-helm/Chart.yaml
index 16c0bd5..66eae23 100644
--- a/pretix-helm/Chart.yaml
+++ b/pretix-helm/Chart.yaml
@@ -12,7 +12,7 @@ dependencies:
     repository: "https://charts.bitnami.com/bitnami"
     condition: postgresql.enabled
   - name: redis
-    version: "19.0.1"
+    version: "21.2.3"
     repository: "https://charts.bitnami.com/bitnami"
     condition: redis.enabled
 sources: