diff --git a/pretix-helm/Chart.lock b/pretix-helm/Chart.lock
index c971546..d1803b7 100644
--- a/pretix-helm/Chart.lock
+++ b/pretix-helm/Chart.lock
@@ -1,9 +1,9 @@
 dependencies:
 - name: postgresql
   repository: https://charts.bitnami.com/bitnami
-  version: 16.7.27
+  version: 18.2.0
 - name: redis
   repository: https://charts.bitnami.com/bitnami
   version: 19.6.4
-digest: sha256:2d3aaa21f018ea007f098d99541123a8ddf0419c3ea5eb82cdaa735bc2b87b62
-generated: "2025-09-20T14:16:30.047125434Z"
+digest: sha256:4acb5d5161b97dd8087672efc2dd391248de17445eca1d8435cc447ceb033be4
+generated: "2025-12-31T16:40:45.002145587Z"
diff --git a/pretix-helm/Chart.yaml b/pretix-helm/Chart.yaml
index 777fbbb..bed0a7f 100644
--- a/pretix-helm/Chart.yaml
+++ b/pretix-helm/Chart.yaml
@@ -8,7 +8,7 @@ keywords:
   - event-tickets
 dependencies:
   - name: postgresql
-    version: "16.7.27"
+    version: "18.2.0"
     repository: "https://charts.bitnami.com/bitnami"
     condition: postgresql.enabled
   - name: redis