diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,13 +7,19 @@
 celery >= 4.3, != 5.0.3
 Click
 elasticsearch > 5.4
-flask
+Flask
 humanize
 pika >= 1.1.0
 psycopg2
-pyyaml
+PyYAML
+requests
 setuptools
 typing-extensions
 
 # test dependencies
 # hypothesis
+
+types-Click
+types-Flask
+types-PyYAML
+types-requests
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__)