Error using graphql-relay with django

[abusquets]

I try to add graphene to my project and I have this error

python manage.py
Traceback (most recent call last):
  File "manage.py", line 17, in <module>
    execute_from_command_line(sys.argv)
  File "/home/abusquets/devel/backend/.venv/lib/python3.8/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "/home/abusquets/devel/backend/.venv/lib/python3.8/site-packages/django/core/management/__init__.py", line 395, in execute
    django.setup()
  File "/home/abusquets/devel/backend/.venv/lib/python3.8/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/home/abusquets/devel/backend/.venv/lib/python3.8/site-packages/django/apps/registry.py", line 91, in populate
    app_config = AppConfig.create(entry)
  File "/home/abusquets/devel/backend/.venv/lib/python3.8/site-packages/django/apps/config.py", line 224, in create
    import_module(entry)
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 848, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/abusquets/devel/backend/.venv/lib/python3.8/site-packages/graphene_django/__init__.py", line 1, in <module>
    from .fields import DjangoConnectionField, DjangoListField
  File "/home/abusquets/devel/backend/.venv/lib/python3.8/site-packages/graphene_django/fields.py", line 5, in <module>
    from graphql_relay.connection.arrayconnection import (
  File "/home/abusquets/devel/backend/.venv/lib/python3.8/site-packages/graphql_relay/connection/arrayconnection.py", line 1, in <module>
    from ..utils import base64, unbase64, is_str
  File "/home/abusquets/devel/backend/.venv/lib/python3.8/site-packages/graphql_relay/__init__.py", line 1, in <module>
    from .connection.connection import (
  File "/home/abusquets/devel/backend/.venv/lib/python3.8/site-packages/graphql_relay/connection/connection.py", line 3, in <module>
    from graphql.type import (
ModuleNotFoundError: No module named 'graphql.type'

My packages are:
graphene = "2.1.9"
graphene-django = "2.15.0"
graphql-core = "2.3.2"
graphql-relay = "2.0.1"