diff --git a/requirements-test.txt b/requirements-test.txt
index e079f8a..e43ee5e 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1 +1,4 @@
 pytest
+types-python-dateutil
+types-pyyaml
+types-requests
diff --git a/swh/__init__.py b/swh/__init__.py
index f14e196..8d9f151 100644
--- 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__)