diff --git a/core/tickets/serializers.py b/core/tickets/serializers.py
index c76f476..f954130 100644
--- a/core/tickets/serializers.py
+++ b/core/tickets/serializers.py
@@ -102,6 +102,13 @@ class IssueSerializer(serializers.ModelSerializer):
                 'timestamp': assignment.timestamp,
                 'assigned_to': assignment.assigned_to.username,
             })
+        for relation in obj.item_relations.all():
+            timeline.append({
+                'type': 'item_relation',
+                'id': relation.id,
+                'timestamp': relation.timestamp,
+                'item': ItemSerializer(relation.item).data,
+            })
         return sorted(timeline, key=lambda x: x['timestamp'])
 
     def get_queryset(self):