diff --git a/src/main/java/com/chat/yourway/mapper/BaseMapper.java b/src/main/java/com/chat/yourway/mapper/BaseMapper.java
index b1b5d57..dafcdb0 100644
--- a/src/main/java/com/chat/yourway/mapper/BaseMapper.java
+++ b/src/main/java/com/chat/yourway/mapper/BaseMapper.java
@@ -4,7 +4,6 @@
 import com.chat.yourway.dto.response.MessageResponseDto;
 import com.chat.yourway.dto.response.notification.LastMessageResponseDto;
 import com.chat.yourway.model.Contact;
-import com.chat.yourway.model.Message;
 import com.chat.yourway.model.Topic;
 import com.chat.yourway.service.LastMessagesService;
 import lombok.RequiredArgsConstructor;
@@ -14,7 +13,6 @@
 
 import java.util.List;
 import java.util.Optional;
-import java.util.Set;
 import java.util.stream.Collectors;
 
 @Named("BaseMapper")
diff --git a/src/main/java/com/chat/yourway/service/TopicSubscriberService.java b/src/main/java/com/chat/yourway/service/TopicSubscriberService.java
index d9827c4..fea5fe2 100644
--- a/src/main/java/com/chat/yourway/service/TopicSubscriberService.java
+++ b/src/main/java/com/chat/yourway/service/TopicSubscriberService.java
@@ -43,8 +43,7 @@ public void unsubscribeFromTopicById(UUID topicId) {
     }
 
     public List<ContactResponseDto> findAllSubscribersByTopicId(UUID id) {
-        Topic topic = topicService.getTopic(id);
-        return topic.getTopicSubscribers().stream()
+        return topicService.getTopic(id).getTopicSubscribers().stream()
                 .map(contactMapper::toResponseDto)
                 .toList();
     }