diff --git a/src/main/java/com/guwan/backend/netty/chat/CourseChatWebSocketHandler.java b/src/main/java/com/guwan/backend/netty/chat/CourseChatWebSocketHandler.java
index 0229147..030d8cb 100644
--- a/src/main/java/com/guwan/backend/netty/chat/CourseChatWebSocketHandler.java
+++ b/src/main/java/com/guwan/backend/netty/chat/CourseChatWebSocketHandler.java
@@ -20,12 +20,9 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.BeanUtils;
 import org.springframework.stereotype.Component;
-
-
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.stream.Collectors;
-
 import static com.guwan.backend.pojo.enums.MessageType.*;
 
 @Slf4j