diff --git a/requirements-test.txt b/requirements-test.txt
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -3,3 +3,7 @@
 celery >= 4.3
 hypothesis >= 3.11.0
 swh.lister
+types-click
+types-flask
+types-pyyaml
+types-requests
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,15 +5,13 @@
 attrs
 attrs-strict
 celery >= 4.3, != 5.0.3
-Click
+click
 elasticsearch > 5.4
 flask
 humanize
 pika >= 1.1.0
 psycopg2
 pyyaml
+requests
 setuptools
 typing-extensions
-
-# test dependencies
-# hypothesis
diff --git a/swh/__init__.py b/swh/__init__.py
--- a/swh/__init__.py
+++ b/swh/__init__.py
@@ -1,4 +1,4 @@
 from pkgutil import extend_path
-from typing import Iterable
+from typing import List
 
-__path__ = extend_path(__path__, __name__)  # type: Iterable[str]
+__path__: List[str] = extend_path(__path__, __name__)