diff --git a/docs/api.rst b/docs/api.rst
index e40dff8..bff2919 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -28,10 +28,9 @@ API Docs
 Tasks API
 ---------
 .. automodule:: inspire_crawler.tasks
-   :members: submit_results, schedule_crawl
-   :undoc-members:
-   :show-inheritance:
+   :members:
 .. autotask:: inspire_crawler.tasks.submit_results
+.. autotask:: inspire_crawler.tasks.schedule_crawl
 
 
 Signal receivers
diff --git a/docs/conf.py b/docs/conf.py
index 919df6b..03b7d1a 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -85,6 +85,9 @@ def _warn_node(self, msg, *args, **kwargs):
     'celery.contrib.sphinx',
 ]
 
+# Remove default Celery sphinx task prefix
+celery_task_prefix = ''
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 
diff --git a/setup.py b/setup.py
index 1fbde04..f1eb5a0 100644
--- a/setup.py
+++ b/setup.py
@@ -76,7 +76,7 @@
     'python-scrapyd-api>=2.0.1',
     'pathlib2>=2.1.0',
     'invenio-celery>=1.0.0a3',
-    'celery<4.0',
+    'celery>=4.0,<5.0',
     'invenio_workflows~=7.0',
     'invenio_oaiharvester>=1.0.0a3',
 ]