diff --git a/swh/web/__init__.py b/swh/web/__init__.py
--- a/swh/web/__init__.py
+++ b/swh/web/__init__.py
@@ -0,0 +1,4 @@
+from pkgutil import extend_path
+from typing import Iterable
+
+__path__ = extend_path(__path__, __name__)  # type: Iterable[str]