diff --git a/backend/src/main/java/ru/micord/ervu/service/ValidationFileService.java b/backend/src/main/java/ru/micord/ervu/service/ValidationFileService.java
index f3286c52..05ed5e7d 100644
--- a/backend/src/main/java/ru/micord/ervu/service/ValidationFileService.java
+++ b/backend/src/main/java/ru/micord/ervu/service/ValidationFileService.java
@@ -14,13 +14,13 @@ import ru.micord.ervu.model.ValidateExportResponse;
  */
 @Service
 public class ValidationFileService {
-  private final ReplyingKafkaService<Object, Bytes> replyingKafkaService;
+  private final ReplyingKafkaService<String, Bytes> replyingKafkaService;
   private final ObjectMapper objectMapper;
   private final String validateExportRequestTopic;
   private final String validateExportReplyTopic;
 
   public ValidationFileService(
-      ReplyingKafkaService<Object, Bytes> replyingKafkaService,
+      ReplyingKafkaService<String, Bytes> replyingKafkaService,
       ObjectMapper objectMapper,
       @Value("${ervu.kafka.validate.export.request}") String validateExportRequestTopic,
       @Value("${ervu.kafka.validate.export.response}") String validateExportReplyTopic) {