diff --git a/ai-analytic-center-biz/src/main/java/com/volvo/ai/analytic/center/mq/CorpusProcessKafkaProducer.java b/ai-analytic-center-biz/src/main/java/com/volvo/ai/analytic/center/mq/CorpusProcessKafkaProducer.java
index c4018f4..213d3ab 100644
--- a/ai-analytic-center-biz/src/main/java/com/volvo/ai/analytic/center/mq/CorpusProcessKafkaProducer.java
+++ b/ai-analytic-center-biz/src/main/java/com/volvo/ai/analytic/center/mq/CorpusProcessKafkaProducer.java
@@ -61,7 +61,7 @@ public class CorpusProcessKafkaProducer {
 
 
 	@KafkaListener(topics = "${spring.kafka.topic}", groupId = "${spring.kafka.group}")
-	public void listen(@Payload  List<Object> messageList,
+	public void listen(@Payload  List<String> messageList,
 						@Header(KafkaHeaders.RECEIVED_PARTITION_ID) List<Integer> partitions,
 						@Header(KafkaHeaders.OFFSET) List<Long> offsets
 	)  {
@@ -73,7 +73,7 @@ public class CorpusProcessKafkaProducer {
 		}
 		try {
 			for (int i = 0; i < messageList.size(); i++) {
-				String message =String.valueOf( messageList.get(i));
+				String message = messageList.get(i);
 				log.debug("corpusProcessKafkaProducer message:{}", message);
 				int partition = partitions.get(i);
 				long offset = offsets.get(i);