diff --git a/zammad/Chart.yaml b/zammad/Chart.yaml
index ed502b32..dbfac1ef 100755
--- a/zammad/Chart.yaml
+++ b/zammad/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v2
 name: zammad
-version: 16.0.9
+version: 16.0.10
 appVersion: 7.0.1-0000
 description: Zammad is a web based open source helpdesk/customer support system with many features to manage customer communication via several channels like telephone, facebook, twitter, chat and e-mails.
 home: https://zammad.org
diff --git a/zammad/templates/service-nginx.yaml b/zammad/templates/service-nginx.yaml
index 0bd32075..f8db6aba 100644
--- a/zammad/templates/service-nginx.yaml
+++ b/zammad/templates/service-nginx.yaml
@@ -14,6 +14,7 @@ spec:
       targetPort: http
       protocol: TCP
       name: http
+      appProtocol: {{ .Values.service.appProtocol }}
   selector:
     {{- include "zammad.selectorLabels" . | nindent 4 }}
     app.kubernetes.io/component: zammad-nginx
diff --git a/zammad/values.yaml b/zammad/values.yaml
index 9150905f..995eddfd 100755
--- a/zammad/values.yaml
+++ b/zammad/values.yaml
@@ -16,6 +16,7 @@ image:
 service:
   type: ClusterIP
   port: 8080
+  appProtocol: kubernetes.io/ws
 
 ingress:
   enabled: false