diff --git a/pretix-helm/Chart.lock b/pretix-helm/Chart.lock
index c971546..ddd6de4 100644
--- a/pretix-helm/Chart.lock
+++ b/pretix-helm/Chart.lock
@@ -4,6 +4,6 @@ dependencies:
   version: 16.7.27
 - name: redis
   repository: https://charts.bitnami.com/bitnami
-  version: 19.6.4
-digest: sha256:2d3aaa21f018ea007f098d99541123a8ddf0419c3ea5eb82cdaa735bc2b87b62
-generated: "2025-09-20T14:16:30.047125434Z"
+  version: 27.0.0
+digest: sha256:905a3c10adc004a859519ad4a8a3695c7f5764afbeb395652d49228382976bcc
+generated: "2026-06-02T14:49:02.899205964Z"
diff --git a/pretix-helm/Chart.yaml b/pretix-helm/Chart.yaml
index 777fbbb..0f5c860 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: "19.6.4"
+    version: "27.0.0"
     repository: "https://charts.bitnami.com/bitnami"
     condition: redis.enabled
 sources: