diff --git a/hosting/k8s/helm/templates/webapp.yaml b/hosting/k8s/helm/templates/webapp.yaml
index fec06cd3d..3987de739 100644
--- a/hosting/k8s/helm/templates/webapp.yaml
+++ b/hosting/k8s/helm/templates/webapp.yaml
@@ -256,6 +256,10 @@ apiVersion: v1
 kind: PersistentVolumeClaim
 metadata:
   name: {{ include "trigger-v4.fullname" . }}-shared
+  {{- if .Values.persistence.shared.retain }}
+  annotations:
+    "helm.sh/resource-policy": keep
+  {{- end }}
   labels:
     {{- include "trigger-v4.labels" . | nindent 4 }}
 spec:
diff --git a/hosting/k8s/helm/values.yaml b/hosting/k8s/helm/values.yaml
index 583097b1c..6a7a4554c 100644
--- a/hosting/k8s/helm/values.yaml
+++ b/hosting/k8s/helm/values.yaml
@@ -557,3 +557,4 @@ persistence:
     accessMode: ReadWriteOnce
     # accessMode: ReadWriteMany  # Use for cross-node deployment (requires compatible storage class)
     storageClass: ""
+    retain: true  # Prevents deletion on uninstall