diff --git a/charts/matrix/Chart.lock b/charts/matrix/Chart.lock
index b8ae3749..639e471e 100644
--- a/charts/matrix/Chart.lock
+++ b/charts/matrix/Chart.lock
@@ -1,12 +1,12 @@
 dependencies:
 - name: postgresql
   repository: oci://registry-1.docker.io/bitnamicharts
-  version: 16.7.10
+  version: 18.0.7
 - name: coturn
   repository: https://small-hack.github.io/coturn-chart
   version: 9.1.0
 - name: matrix-authentication-service
   repository: https://small-hack.github.io/matrix-authentication-service-chart
   version: 1.6.0
-digest: sha256:aee9657a41197dafb1d60008e467cff5ee9940c31af51b1b91cdddddc85fe891
-generated: "2025-06-08T21:07:34.99203565Z"
+digest: sha256:313ef7cbbce6e8f3cac4262dbc1ff6a98ecefb52aa71561391cf5a63dd63903b
+generated: "2025-10-06T12:16:51.595110646Z"
diff --git a/charts/matrix/Chart.yaml b/charts/matrix/Chart.yaml
index ab441d74..b6a1d14d 100644
--- a/charts/matrix/Chart.yaml
+++ b/charts/matrix/Chart.yaml
@@ -8,7 +8,7 @@ sources:
 
 type: application
 
-version: 20.0.0
+version: 21.0.0
 
 # renovate: image=ghcr.io/element-hq/synapse
 appVersion: v1.131.0
@@ -19,7 +19,7 @@ maintainers:
 
 dependencies:
   - name: postgresql
-    version: 16.7.10
+    version: 18.0.7
     repository: oci://registry-1.docker.io/bitnamicharts
     condition: postgresql.enabled
 
diff --git a/charts/matrix/README.md b/charts/matrix/README.md
index 731b1279..9a3a5b11 100644
--- a/charts/matrix/README.md
+++ b/charts/matrix/README.md
@@ -1,6 +1,6 @@
 # matrix
 
-![Version: 20.0.0](https://img.shields.io/badge/Version-20.0.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: v1.131.0](https://img.shields.io/badge/AppVersion-v1.131.0-informational?style=flat-square)
+![Version: 21.0.0](https://img.shields.io/badge/Version-21.0.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: v1.131.0](https://img.shields.io/badge/AppVersion-v1.131.0-informational?style=flat-square)
 
 A Helm chart to deploy a Matrix homeserver stack on Kubernetes
 
@@ -22,7 +22,7 @@ A Helm chart to deploy a Matrix homeserver stack on Kubernetes
 |------------|------|---------|
 | https://small-hack.github.io/coturn-chart | coturn | 9.1.0 |
 | https://small-hack.github.io/matrix-authentication-service-chart | mas(matrix-authentication-service) | 1.6.0 |
-| oci://registry-1.docker.io/bitnamicharts | postgresql | 16.7.10 |
+| oci://registry-1.docker.io/bitnamicharts | postgresql | 18.0.7 |
 
 ## Values
 
diff --git a/charts/matrix/charts/postgresql-16.7.10.tgz b/charts/matrix/charts/postgresql-16.7.10.tgz
deleted file mode 100644
index c345cee4..00000000
Binary files a/charts/matrix/charts/postgresql-16.7.10.tgz and /dev/null differ
diff --git a/charts/matrix/charts/postgresql-18.0.7.tgz b/charts/matrix/charts/postgresql-18.0.7.tgz
new file mode 100644
index 00000000..7182baf7
Binary files /dev/null and b/charts/matrix/charts/postgresql-18.0.7.tgz differ