diff --git a/requirements-swh.txt b/requirements-swh.txt
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1,4 +1,4 @@
 swh.core
 swh.storage >= 0.0.103
 swh.storage[schemata] >= 0.0.76
-swh.scheduler >= 0.0.31
+swh.scheduler >= 0.0.38
diff --git a/swh/lister/core/tasks.py b/swh/lister/core/tasks.py
--- a/swh/lister/core/tasks.py
+++ b/swh/lister/core/tasks.py
@@ -7,12 +7,12 @@
 
 from celery import group
 
-from swh.scheduler.task import Task, TaskType
+from swh.scheduler.task import Task
 
 from .abstractattribute import AbstractAttribute
 
 
-class AbstractTaskMeta(abc.ABCMeta, TaskType):
+class AbstractTaskMeta(abc.ABCMeta):
     pass