diff --git a/program/serializers.py b/program/serializers.py
index 3ac919c2f739dd057782e986fe4b850d3b7dfaec..8ec1d8236ef1de75566dc79009ed887240ee7f49 100644
--- a/program/serializers.py
+++ b/program/serializers.py
@@ -653,7 +653,7 @@ class NoteLinkSerializer(serializers.ModelSerializer):
 class NoteSerializer(ThumbnailsMixin, serializers.ModelSerializer):
     links = NoteLinkSerializer(many=True, required=False)
     timeslot = serializers.PrimaryKeyRelatedField(queryset=TimeSlot.objects.all())
-    contributors = serializers.PrimaryKeyRelatedField(queryset=Host.objects.all())
+    contributors = serializers.PrimaryKeyRelatedField(queryset=Host.objects.all(), many=True)
     thumbnails = serializers.SerializerMethodField()
 
     class Meta: