diff --git a/helm/dendrite/README.md b/helm/dendrite/README.md
index c94e6997c..e4e2010ee 100644
--- a/helm/dendrite/README.md
+++ b/helm/dendrite/README.md
@@ -113,7 +113,7 @@ Create a folder `appservices` and place your configurations in there.  The confi
 | postgresql.auth.username | string | `"dendrite"` |  |
 | postgresql.enabled | bool | See value.yaml | Enable and configure postgres as the database for dendrite. |
 | postgresql.image.repository | string | `"bitnami/postgresql"` |  |
-| postgresql.image.tag | string | `"14.4.0"` |  |
+| postgresql.image.tag | string | `"15.1.0"` |  |
 | postgresql.persistence.enabled | bool | `false` |  |
 | resources | object | sets some sane default values | Default resource requests/limits. |
 | service.port | int | `80` |  |
diff --git a/helm/dendrite/ci/ct-ingress-values.yaml b/helm/dendrite/ci/ct-ingress-values.yaml
index 06a807432..2ad67ae49 100644
--- a/helm/dendrite/ci/ct-ingress-values.yaml
+++ b/helm/dendrite/ci/ct-ingress-values.yaml
@@ -1,6 +1,9 @@
 ---
 postgresql:
   enabled: true
+  primary:
+    persistence:
+      size: 1Gi
 
 global:
   server_name: "localhost"
diff --git a/helm/dendrite/ci/ct-postgres-sharedsecret-values.yaml b/helm/dendrite/ci/ct-postgres-sharedsecret-values.yaml
new file mode 100644
index 000000000..76039e608
--- /dev/null
+++ b/helm/dendrite/ci/ct-postgres-sharedsecret-values.yaml
@@ -0,0 +1,15 @@
+---
+postgresql:
+  enabled: true
+  primary:
+    persistence:
+      size: 1Gi
+
+global:
+  server_name: "localhost"
+
+clientapi:
+  shared_secret: "d233f2fcb0470845a8e150a20ef594ddbe0b4cf7fe482fb9d5120c198557acbf" # echo "dendrite" | sha256sum
+
+ingress:
+  enabled: true
diff --git a/helm/dendrite/ci/ct-postgres-values.yaml b/helm/dendrite/ci/ct-postgres-values.yaml
index 7bb679c18..15272dc25 100644
--- a/helm/dendrite/ci/ct-postgres-values.yaml
+++ b/helm/dendrite/ci/ct-postgres-values.yaml
@@ -1,6 +1,9 @@
 ---
 postgresql:
   enabled: true
+  primary:
+    persistence:
+      size: 1Gi
 
 global:
   server_name: "localhost"