diff --git a/requirements-http.txt b/requirements-http.txt
--- a/requirements-http.txt
+++ b/requirements-http.txt
@@ -6,3 +6,4 @@
 msgpack >= 1.0.0
 requests
 blinker  # dependency of sentry-sdk[flask]
+types-Flask
diff --git a/requirements-test.txt b/requirements-test.txt
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -4,3 +4,4 @@
 hypothesis >= 3.11.0
 pre-commit
 pytz
+types-pytz
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,6 @@
 Deprecated
 PyYAML
 sentry-sdk
+types-click
+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__)