diff --git a/iot-common/iot-data/src/main/java/com/qiuguo/iot/data/domain/BaseSession.java b/iot-common/iot-data/src/main/java/com/qiuguo/iot/data/domain/BaseSession.java
index b19374c..52c525f 100644
--- a/iot-common/iot-data/src/main/java/com/qiuguo/iot/data/domain/BaseSession.java
+++ b/iot-common/iot-data/src/main/java/com/qiuguo/iot/data/domain/BaseSession.java
@@ -6,6 +6,8 @@ import lombok.Data;
 import org.springframework.web.reactive.socket.WebSocketMessage;
 import org.springframework.web.reactive.socket.WebSocketSession;
 import reactor.core.publisher.FluxSink;
+
+import java.util.Collections;
 import java.util.List;
 import java.util.ArrayList;
 
@@ -82,6 +84,7 @@ public class BaseSession {
 
     /**
      * 临时记录发送给客户端resp
+     * 语音合成时使用
      */
-    List<BaseMessageResp> respList =  new ArrayList<>(10);
+    List<BaseMessageResp> respList = Collections.synchronizedList(new ArrayList<>(10));
 }