diff --git a/services/backend/api/v1/task/views.py b/services/backend/api/v1/task/views.py
index afa91cf..1b86af1 100644
--- a/services/backend/api/v1/task/views.py
+++ b/services/backend/api/v1/task/views.py
@@ -35,6 +35,7 @@ router = Router(tags=["competition"])
 )
 def start_competition(request, competition_id: UUID) -> PingOut:
     competition = get_object_or_404(Competition, pk=competition_id)
+    competition.participants.add(request.auth)
     state_obj, _ = State.objects.update_or_create(
         user=request.auth, competition=competition, state="started"
     )
diff --git a/services/backend/apps/task/models.py b/services/backend/apps/task/models.py
index 8bf11e3..c0a4ea5 100644
--- a/services/backend/apps/task/models.py
+++ b/services/backend/apps/task/models.py
@@ -19,9 +19,7 @@ class CompetitionTask(BaseModel):
     def answer_file_upload_to(instance, filename) -> str:
         return f"tasks/{instance.id}/answer/{uuid4()}/{filename}"
 
-    in_competition_position = models.PositiveSmallIntegerField(
-        null=True, blank=True
-    )
+    in_competition_position = models.PositiveSmallIntegerField()
     competition = models.ForeignKey(Competition, on_delete=models.CASCADE)
     title = models.CharField(verbose_name="заголовок", max_length=50)
     description = MartorField(verbose_name="описание")