diff --git a/tcs-upgrade/kafka/kafka.yaml b/tcs-upgrade/kafka/kafka.yaml
index 8c51e07..e8f0f70 100644
--- a/tcs-upgrade/kafka/kafka.yaml
+++ b/tcs-upgrade/kafka/kafka.yaml
@@ -67,6 +67,10 @@ spec:
     enabled: true
   listeners:
       external:
+        authentication:
+          type: plain                
+          jaasConfig:                 ]
+            secretRef: credential
         externalAccess:
           type: nodePort
           nodePort: