diff --git a/openpype/modules/ftrack/plugins/publish/integrate_hierarchy_ftrack.py b/openpype/modules/ftrack/plugins/publish/integrate_hierarchy_ftrack.py
index 9f35424d42..6daaea5f18 100644
--- a/openpype/modules/ftrack/plugins/publish/integrate_hierarchy_ftrack.py
+++ b/openpype/modules/ftrack/plugins/publish/integrate_hierarchy_ftrack.py
@@ -378,7 +378,7 @@ class IntegrateHierarchyToFtrack(pyblish.api.ContextPlugin):
                     existing_tasks.append(task_name_low)
 
                     for instance in instances_by_task_name[task_name_low]:
-                        instance["ftrackTask"] = child
+                        instance.data["ftrackTask"] = child
 
             for task_name in tasks:
                 task_type = tasks[task_name]["type"]