diff --git a/.gitignore b/.gitignore
index 7cf4ac96..bfeb4264 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 *.log
 taiga/search
 settings/local.py
+settings/celery_local.py
 database.sqlite
 logs
 media
diff --git a/requirements.txt b/requirements.txt
index 8f633141..3a4b1d8a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ requests-oauthlib==0.6.2
 webcolors==1.5
 django-sr==0.0.4
 easy-thumbnails==2.3
-celery==3.1.24
+celery==4.0.2
 redis==2.10.5
 Unidecode==0.04.19
 raven==5.32.0
diff --git a/settings/celery.py b/settings/celery.py
index 8001a19c..b22c7167 100644
--- a/settings/celery.py
+++ b/settings/celery.py
@@ -16,21 +16,22 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from kombu import Exchange, Queue
+from kombu import Queue
 
-BROKER_URL = 'amqp://guest:guest@localhost:5672//'
-CELERY_RESULT_BACKEND = 'redis://localhost:6379/0'
+broker_url = 'amqp://guest:guest@localhost:5672//'
+result_backend = 'redis://localhost:6379/0'
 
-CELERY_ACCEPT_CONTENT = ['pickle',] # Values are 'pickle', 'json', 'msgpack' and 'yaml'
+accept_content = ['pickle',] # Values are 'pickle', 'json', 'msgpack' and 'yaml'
+task_serializer = "pickle"
+result_serializer = "pickle"
 
-CELERY_TIMEZONE = 'Europe/Madrid'
-CELERY_ENABLE_UTC = True
+timezone = 'Europe/Madrid'
 
-CELERY_DEFAULT_QUEUE = 'tasks'
-CELERY_QUEUES = (
+task_default_queue = 'tasks'
+task_queues = (
     Queue('tasks', routing_key='task.#'),
     Queue('transient', routing_key='transient.#', delivery_mode=1)
 )
-CELERY_DEFAULT_EXCHANGE = 'tasks'
-CELERY_DEFAULT_EXCHANGE_TYPE = 'topic'
-CELERY_DEFAULT_ROUTING_KEY = 'task.default'
+task_default_exchange = 'tasks'
+task_default_exchange_type = 'topic'
+task_default_routing_key = 'task.default'
diff --git a/settings/celery_local.py.example b/settings/celery_local.py.example
new file mode 100644
index 00000000..a16e5ec3
--- /dev/null
+++ b/settings/celery_local.py.example
@@ -0,0 +1,4 @@
+from .celery import *
+
+# To use celery in memory
+#task_always_eager = True
diff --git a/settings/local.py.example b/settings/local.py.example
index fd76b29f..626d4911 100644
--- a/settings/local.py.example
+++ b/settings/local.py.example
@@ -157,13 +157,10 @@ DATABASES = {
 #########################################
 ## CELERY
 #########################################
-
-#from .celery import *
+# Set to True to enable celery and work in async mode or False
+# to disable it and work in sync mode. You can find the celery
+# settings in settings/celery.py and settings/celery-local.py
 #CELERY_ENABLED = True
-#
-# To use celery in memory
-#CELERY_ENABLED = True
-#CELERY_ALWAYS_EAGER = True
 
 
 #########################################
diff --git a/settings/testing.py b/settings/testing.py
index e3f565e2..da641cf2 100644
--- a/settings/testing.py
+++ b/settings/testing.py
@@ -19,7 +19,6 @@
 from .development import *
 
 CELERY_ENABLED = False
-CELERY_ALWAYS_EAGER = True
 
 MEDIA_ROOT = "/tmp"
 
diff --git a/taiga/celery.py b/taiga/celery.py
index f080262f..26d23017 100644
--- a/taiga/celery.py
+++ b/taiga/celery.py
@@ -20,11 +20,15 @@ import os
 
 from celery import Celery
 
-from django.conf import settings
-
 os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'settings')
 
-app = Celery('taiga')
+from django.conf import settings
 
-app.config_from_object('django.conf:settings')
-app.autodiscover_tasks(lambda: settings.INSTALLED_APPS, related_name="deferred")
+try:
+    from settings import celery_local as celery_settings
+except ImportError:
+    from settings import celery as celery_settings
+
+app = Celery('taiga')
+app.config_from_object(celery_settings)
+app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)
diff --git a/taiga/deferred.py b/taiga/deferred.py
deleted file mode 100644
index 0ac75e89..00000000
--- a/taiga/deferred.py
+++ /dev/null
@@ -1,69 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright (C) 2014-2017 Andrey Antukh <niwi@niwi.nz>
-# Copyright (C) 2014-2017 Jesús Espino <jespinog@gmail.com>
-# Copyright (C) 2014-2017 David Barragán <bameda@dbarragan.com>
-# Copyright (C) 2014-2017 Alejandro Alonso <alejandro.alonso@kaleidos.net>
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as
-# published by the Free Software Foundation, either version 3 of the
-# License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-#
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-from django.conf import settings
-
-from .celery import app
-
-
-def _send_task(task, args, kwargs, **options):
-    if settings.CELERY_ALWAYS_EAGER:
-        return app.tasks[task].apply(args, kwargs, **options)
-    return app.send_task(task, args, kwargs, **options)
-
-
-def defer(task: str, *args, **kwargs):
-    """Defer the execution of a task.
-
-    Defer the execution of a task and returns a future objects with the following methods among
-    others:
-    - `failed()` Returns `True` if the task failed.
-    - `ready()` Returns `True` if the task has been executed.
-    - `forget()` Forget about the result.
-    - `get()` Wait until the task is ready and return its result.
-    - `result` When the task has been executed the result is in this attribute.
-    More info at Celery docs on `AsyncResult` object.
-
-    :param task: Name of the task to execute.
-
-    :return: A future object.
-    """
-    return _send_task(task, args, kwargs, routing_key="transient.deferred")
-
-
-def call_async(task: str, *args, **kwargs):
-    """Run a task and ignore its result.
-
-    This is just a star argument version of `apply_async`.
-
-    :param task: Name of the task to execute.
-    :param args: Arguments for the task.
-    :param kwargs: Keyword arguments for the task.
-    """
-    apply_async(task, args, kwargs)
-
-
-def apply_async(task: str, args=None, kwargs=None, **options):
-    """Run a task and ignore its result.
-
-    :param task: Name of the task to execute.
-    :param args: Tupple of arguments for the task.
-    :param kwargs: Dict of keyword arguments for the task.
-    :param options: Celery-specific options when running the task. See Celery docs on `apply_async`
-    """
-    _send_task(task, args, kwargs, **options)
diff --git a/tests/conftest.py b/tests/conftest.py
index 5c9c7686..fd93acb1 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -36,3 +36,5 @@ def pytest_runtest_setup(item):
 
 def pytest_configure(config):
     django.setup()
+    from taiga.celery import app
+    app.conf.task_always_eager = True
diff --git a/tests/integration/test_exporter_api.py b/tests/integration/test_exporter_api.py
index 40e6deb2..055bafe3 100644
--- a/tests/integration/test_exporter_api.py
+++ b/tests/integration/test_exporter_api.py
@@ -40,8 +40,6 @@ def test_invalid_project_export(client):
 
 
 def test_valid_project_export_with_celery_disabled(client, settings):
-    settings.CELERY_ENABLED = False
-
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(owner=user)
     f.MembershipFactory(project=project, user=user, is_admin=True)
@@ -57,8 +55,6 @@ def test_valid_project_export_with_celery_disabled(client, settings):
 
 
 def test_valid_project_export_with_celery_disabled_and_gzip(client, settings):
-    settings.CELERY_ENABLED = False
-
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(owner=user)
     f.MembershipFactory(project=project, user=user, is_admin=True)
@@ -93,6 +89,7 @@ def test_valid_project_export_with_celery_enabled(client, settings):
         args = (project.id, project.slug, response_data["export_id"], "plain")
         kwargs = {"countdown": settings.EXPORTS_TTL}
         delete_project_dump_mock.apply_async.assert_called_once_with(args, **kwargs)
+    settings.CELERY_ENABLED = False
 
 
 def test_valid_project_export_with_celery_enabled_and_gzip(client, settings):
@@ -115,10 +112,10 @@ def test_valid_project_export_with_celery_enabled_and_gzip(client, settings):
         args = (project.id, project.slug, response_data["export_id"], "gzip")
         kwargs = {"countdown": settings.EXPORTS_TTL}
         delete_project_dump_mock.apply_async.assert_called_once_with(args, **kwargs)
+    settings.CELERY_ENABLED = False
 
 
 def test_valid_project_with_throttling(client, settings):
-    settings.CELERY_ENABLED = False
     settings.REST_FRAMEWORK["DEFAULT_THROTTLE_RATES"]["import-dump-mode"] = "1/minute"
 
     user = f.UserFactory.create()
diff --git a/tests/integration/test_importer_api.py b/tests/integration/test_importer_api.py
index 84dccbfd..9764e9a8 100644
--- a/tests/integration/test_importer_api.py
+++ b/tests/integration/test_importer_api.py
@@ -1147,7 +1147,6 @@ def test_invalid_dump_import(client):
 
 
 def test_valid_dump_import_without_enough_public_projects_slots(client, settings):
-    settings.CELERY_ENABLED = False
     user = f.UserFactory.create(max_public_projects=0)
     client.login(user)
 
@@ -1170,7 +1169,6 @@ def test_valid_dump_import_without_enough_public_projects_slots(client, settings
 
 
 def test_valid_dump_import_without_enough_private_projects_slots(client, settings):
-    settings.CELERY_ENABLED = False
     user = f.UserFactory.create(max_private_projects=0)
     client.login(user)
 
@@ -1193,7 +1191,6 @@ def test_valid_dump_import_without_enough_private_projects_slots(client, setting
 
 
 def test_valid_dump_import_without_enough_membership_private_project_slots_one_project(client, settings):
-    settings.CELERY_ENABLED = False
     user = f.UserFactory.create(max_memberships_private_projects=5)
     client.login(user)
 
@@ -1241,7 +1238,6 @@ def test_valid_dump_import_without_enough_membership_private_project_slots_one_p
 
 
 def test_valid_dump_import_without_enough_membership_public_project_slots_one_project(client, settings):
-    settings.CELERY_ENABLED = False
     user = f.UserFactory.create(max_memberships_public_projects=5)
     client.login(user)
 
@@ -1289,7 +1285,6 @@ def test_valid_dump_import_without_enough_membership_public_project_slots_one_pr
 
 
 def test_valid_dump_import_with_enough_membership_private_project_slots_multiple_projects(client, settings):
-    settings.CELERY_ENABLED = False
 
     user = f.UserFactory.create(max_memberships_private_projects=10)
     project = f.ProjectFactory.create(owner=user)
@@ -1344,8 +1339,6 @@ def test_valid_dump_import_with_enough_membership_private_project_slots_multiple
 
 
 def test_valid_dump_import_with_enough_membership_public_project_slots_multiple_projects(client, settings):
-    settings.CELERY_ENABLED = False
-
     user = f.UserFactory.create(max_memberships_public_projects=10)
     project = f.ProjectFactory.create(owner=user)
     f.MembershipFactory.create(project=project)
@@ -1400,7 +1393,6 @@ def test_valid_dump_import_with_enough_membership_public_project_slots_multiple_
 
 
 def test_valid_dump_import_with_the_limit_of_membership_whit_you_for_private_project(client, settings):
-    settings.CELERY_ENABLED = False
     user = f.UserFactory.create(max_memberships_private_projects=5)
     client.login(user)
 
@@ -1443,7 +1435,6 @@ def test_valid_dump_import_with_the_limit_of_membership_whit_you_for_private_pro
 
 
 def test_valid_dump_import_with_the_limit_of_membership_whit_you_for_public_project(client, settings):
-    settings.CELERY_ENABLED = False
     user = f.UserFactory.create(max_memberships_public_projects=5)
     client.login(user)
 
@@ -1486,8 +1477,6 @@ def test_valid_dump_import_with_the_limit_of_membership_whit_you_for_public_proj
 
 
 def test_valid_dump_import_with_celery_disabled(client, settings):
-    settings.CELERY_ENABLED = False
-
     user = f.UserFactory.create()
     client.login(user)
 
@@ -1508,7 +1497,6 @@ def test_valid_dump_import_with_celery_disabled(client, settings):
 
 
 def test_invalid_dump_import_with_celery_disabled(client, settings):
-    settings.CELERY_ENABLED = False
     user = f.UserFactory.create(max_memberships_public_projects=5)
     client.login(user)
 
@@ -1568,6 +1556,7 @@ def test_valid_dump_import_with_celery_enabled(client, settings):
     assert response.status_code == 202
     assert "import_id" in response.data
     assert Project.objects.filter(slug="valid-project").count() == 1
+    settings.CELERY_ENABLED = False
 
 
 def test_invalid_dump_import_with_celery_enabled(client, settings):
@@ -1611,6 +1600,7 @@ def test_invalid_dump_import_with_celery_enabled(client, settings):
     assert response.status_code == 202
     assert "import_id" in response.data
     assert Project.objects.filter(slug="invalid-project").count() == 0
+    settings.CELERY_ENABLED = False
 
 
 def test_dump_import_throttling(client, settings):
diff --git a/tests/integration/test_importers_asana_api.py b/tests/integration/test_importers_asana_api.py
index 44a400c2..66ddfd4c 100644
--- a/tests/integration/test_importers_asana_api.py
+++ b/tests/integration/test_importers_asana_api.py
@@ -207,6 +207,7 @@ def test_import_asana_project_without_project_id(client, settings):
         response = client.post(url, content_type="application/json", data=json.dumps({"token": "token"}))
 
     assert response.status_code == 400
+    settings.CELERY_ENABLED = False
 
 
 def test_import_asana_project_with_celery_enabled(client, settings):
@@ -226,11 +227,10 @@ def test_import_asana_project_with_celery_enabled(client, settings):
 
     assert response.status_code == 202
     assert "task_id" in response.data
+    settings.CELERY_ENABLED = False
 
 
 def test_import_asana_project_with_celery_disabled(client, settings):
-    settings.CELERY_ENABLED = False
-
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(slug="imported-project")
     client.login(user)
diff --git a/tests/integration/test_importers_github_api.py b/tests/integration/test_importers_github_api.py
index a21494fe..94fac6b1 100644
--- a/tests/integration/test_importers_github_api.py
+++ b/tests/integration/test_importers_github_api.py
@@ -195,6 +195,7 @@ def test_import_github_project_without_project_id(client, settings):
         response = client.post(url, content_type="application/json", data=json.dumps({"token": "token"}))
 
     assert response.status_code == 400
+    settings.CELERY_ENABLED = False
 
 
 def test_import_github_project_with_celery_enabled(client, settings):
@@ -214,11 +215,10 @@ def test_import_github_project_with_celery_enabled(client, settings):
 
     assert response.status_code == 202
     assert "task_id" in response.data
+    settings.CELERY_ENABLED = False
 
 
 def test_import_github_project_with_celery_disabled(client, settings):
-    settings.CELERY_ENABLED = False
-
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(slug="imported-project")
     client.login(user)
diff --git a/tests/integration/test_importers_jira_api.py b/tests/integration/test_importers_jira_api.py
index d4b3dc24..d2c014fb 100644
--- a/tests/integration/test_importers_jira_api.py
+++ b/tests/integration/test_importers_jira_api.py
@@ -203,6 +203,7 @@ def test_import_jira_project_without_project_id(client, settings):
         response = client.post(url, content_type="application/json", data=json.dumps({"token": "access.secret", "url": "http://jiraserver"}))
 
     assert response.status_code == 400
+    settings.CELERY_ENABLED = False
 
 
 def test_import_jira_project_without_url(client, settings):
@@ -217,6 +218,7 @@ def test_import_jira_project_without_url(client, settings):
         response = client.post(url, content_type="application/json", data=json.dumps({"token": "access.secret", "project_id": 1}))
 
     assert response.status_code == 400
+    settings.CELERY_ENABLED = False
 
 
 def test_import_jira_project_with_celery_enabled(client, settings):
@@ -236,11 +238,10 @@ def test_import_jira_project_with_celery_enabled(client, settings):
 
     assert response.status_code == 202
     assert "task_id" in response.data
+    settings.CELERY_ENABLED = False
 
 
 def test_import_jira_project_with_celery_disabled(client, settings):
-    settings.CELERY_ENABLED = False
-
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(slug="imported-project")
     client.login(user)
diff --git a/tests/integration/test_importers_trello_api.py b/tests/integration/test_importers_trello_api.py
index 4d940505..9497e28e 100644
--- a/tests/integration/test_importers_trello_api.py
+++ b/tests/integration/test_importers_trello_api.py
@@ -203,6 +203,7 @@ def test_import_trello_project_without_project_id(client, settings):
         response = client.post(url, content_type="application/json", data=json.dumps({"token": "token"}))
 
     assert response.status_code == 400
+    settings.CELERY_ENABLED = False
 
 
 def test_import_trello_project_with_celery_enabled(client, settings):
@@ -222,11 +223,10 @@ def test_import_trello_project_with_celery_enabled(client, settings):
 
     assert response.status_code == 202
     assert "task_id" in response.data
+    settings.CELERY_ENABLED = False
 
 
 def test_import_trello_project_with_celery_disabled(client, settings):
-    settings.CELERY_ENABLED = False
-
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(slug="imported-project")
     client.login(user)
diff --git a/tests/integration/test_projects.py b/tests/integration/test_projects.py
index 07eb9caa..8fbe6e03 100644
--- a/tests/integration/test_projects.py
+++ b/tests/integration/test_projects.py
@@ -1861,11 +1861,10 @@ def test_delete_project_with_celery_enabled(client, settings):
         assert project.memberships.count() == 0
         assert project.blocked_code == BLOCKED_BY_DELETING
         delete_project_mock.delay.assert_called_once_with(project.id)
+    settings.CELERY_ENABLED = False
 
 
 def test_delete_project_with_celery_disabled(client, settings):
-    settings.CELERY_ENABLED = False
-
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(owner=user)
     role = f.RoleFactory.create(project=project, permissions=["view_project"])
diff --git a/tests/unit/test_deferred.py b/tests/unit/test_deferred.py
deleted file mode 100644
index 69295e2b..00000000
--- a/tests/unit/test_deferred.py
+++ /dev/null
@@ -1,59 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright (C) 2014-2017 Andrey Antukh <niwi@niwi.nz>
-# Copyright (C) 2014-2017 Jesús Espino <jespinog@gmail.com>
-# Copyright (C) 2014-2017 David Barragán <bameda@dbarragan.com>
-# Copyright (C) 2014-2017 Alejandro Alonso <alejandro.alonso@kaleidos.net>
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as
-# published by the Free Software Foundation, either version 3 of the
-# License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-#
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-from unittest import mock
-
-from taiga import celery
-from taiga.deferred import defer, call_async, apply_async
-
-
-def test_defer():
-    # settings.CELERY_ALWAYS_EAGER = True
-    name = "task name"
-    args = (1, 2)
-    kwargs = {"kw": "keyword argument"}
-
-    with mock.patch("taiga.deferred.app") as app:
-        defer(name, *args, **kwargs)
-        app.tasks[name].apply.assert_called_once_with(args, kwargs,
-                                                      routing_key="transient.deferred")
-
-
-def test_apply_async():
-    name = "task name"
-    args = (1, 2)
-    kwargs = {"kw": "keyword argument"}
-
-    with mock.patch("taiga.deferred.app") as app:
-        apply_async(name, args, kwargs)
-        app.tasks[name].apply.assert_called_once_with(args, kwargs)
-
-
-def test_call_async():
-    name = "task name"
-    args = (1, 2)
-    kwargs = {"kw": "keyword argument"}
-
-    with mock.patch("taiga.deferred.app") as app:
-        call_async(name, *args, **kwargs)
-        app.tasks[name].apply.assert_called_once_with(args, kwargs)
-
-
-def test_task_invocation():
-    celery.app.task(name="_test_task")(lambda: 1)
-    assert defer("_test_task").get() == 1