diff --git a/src/main/java/ru/ulstu/conference/service/ConferenceService.java b/src/main/java/ru/ulstu/conference/service/ConferenceService.java
index 13ce1d5..9c40295 100644
--- a/src/main/java/ru/ulstu/conference/service/ConferenceService.java
+++ b/src/main/java/ru/ulstu/conference/service/ConferenceService.java
@@ -68,7 +68,7 @@ public class ConferenceService {
         if (conferenceDto.getDeadlines().get(deadlineIndex).getId() != null) {
             conferenceDto.getRemovedDeadlineIds().add(conferenceDto.getDeadlines().get(deadlineIndex).getId());
         }
-        conferenceDto.getDeadlines().remove(conferenceDto.getDeadlines().get(deadlineIndex));
+        conferenceDto.getDeadlines().remove((int) deadlineIndex);
     }
 
     private Conference copyFromDto(Conference conference, ConferenceDto conferenceDto) throws IOException {