diff --git a/Back-End/Subscriptions/serializers.py b/Back-End/Subscriptions/serializers.py
index 04ed9aa..1f472f5 100644
--- a/Back-End/Subscriptions/serializers.py
+++ b/Back-End/Subscriptions/serializers.py
@@ -202,7 +202,7 @@ class StudentSerializer(serializers.ModelSerializer):
         languages_data = validated_data.pop('spoken_languages', [])
         student = Student.objects.create(**validated_data)
         student.guardians.set(self.create_or_update_guardians(guardians_data))
-        student.siblings.set(self.create_or_update_siblings(siblings_data))
+        student.siblings.set(self.create_or_update_siblings(siblings_data, student))
         student.spoken_languages.set(self.create_or_update_languages(languages_data))
 
         return student