diff --git a/src/ahriman/application/ahriman.py b/src/ahriman/application/ahriman.py
index 05db2ad1..33ddffb0 100644
--- a/src/ahriman/application/ahriman.py
+++ b/src/ahriman/application/ahriman.py
@@ -22,7 +22,7 @@ import sys
 import tempfile
 
 from pathlib import Path
-from typing import TypeVar
+from typing import List, TypeVar
 
 from ahriman import version
 from ahriman.application import handlers
@@ -33,6 +33,9 @@ from ahriman.models.sign_settings import SignSettings
 from ahriman.models.user_access import UserAccess
 
 
+__all__: List[str] = []
+
+
 # this workaround is for several things
 # firstly python devs don't think that is it error and asking you for workarounds https://bugs.python.org/issue41592
 # secondly linters don't like when you are importing private members
diff --git a/src/ahriman/core/auth/helpers.py b/src/ahriman/core/auth/helpers.py
index c25d9508..829a1513 100644
--- a/src/ahriman/core/auth/helpers.py
+++ b/src/ahriman/core/auth/helpers.py
@@ -26,6 +26,9 @@ except ImportError:
     _has_aiohttp_security = False
 
 
+__all__ = ["authorized_userid", "check_authorized", "forget", "remember"]
+
+
 async def authorized_userid(*args: Any) -> Any:
     """
     handle aiohttp security methods
diff --git a/src/ahriman/core/database/data/package_remotes.py b/src/ahriman/core/database/data/package_remotes.py
index 5624159c..1a50f414 100644
--- a/src/ahriman/core/database/data/package_remotes.py
+++ b/src/ahriman/core/database/data/package_remotes.py
@@ -24,6 +24,9 @@ from ahriman.models.remote_source import RemoteSource
 from ahriman.models.repository_paths import RepositoryPaths
 
 
+__all__ = ["migrate_package_remotes"]
+
+
 # pylint: disable=protected-access
 def migrate_package_remotes(connection: Connection, paths: RepositoryPaths) -> None:
     """
diff --git a/src/ahriman/core/database/data/package_statuses.py b/src/ahriman/core/database/data/package_statuses.py
index 27777f31..238064c9 100644
--- a/src/ahriman/core/database/data/package_statuses.py
+++ b/src/ahriman/core/database/data/package_statuses.py
@@ -26,6 +26,9 @@ from ahriman.models.package import Package
 from ahriman.models.repository_paths import RepositoryPaths
 
 
+__all__ = ["migrate_package_statuses"]
+
+
 def migrate_package_statuses(connection: Connection, paths: RepositoryPaths) -> None:
     """
     perform migration for package statuses
diff --git a/src/ahriman/core/database/data/patches.py b/src/ahriman/core/database/data/patches.py
index 3e5c6d72..5b182158 100644
--- a/src/ahriman/core/database/data/patches.py
+++ b/src/ahriman/core/database/data/patches.py
@@ -22,6 +22,9 @@ from sqlite3 import Connection
 from ahriman.models.repository_paths import RepositoryPaths
 
 
+__all__ = ["migrate_patches"]
+
+
 def migrate_patches(connection: Connection, paths: RepositoryPaths) -> None:
     """
     perform migration for patches
diff --git a/src/ahriman/core/database/data/users.py b/src/ahriman/core/database/data/users.py
index dc5787b8..05357a8f 100644
--- a/src/ahriman/core/database/data/users.py
+++ b/src/ahriman/core/database/data/users.py
@@ -22,6 +22,9 @@ from sqlite3 import Connection
 from ahriman.core.configuration import Configuration
 
 
+__all__ = ["migrate_users_data"]
+
+
 def migrate_users_data(connection: Connection, configuration: Configuration) -> None:
     """
     perform migration for users
diff --git a/src/ahriman/core/database/migrations/m000_initial.py b/src/ahriman/core/database/migrations/m000_initial.py
index 054b6754..85fd48fd 100644
--- a/src/ahriman/core/database/migrations/m000_initial.py
+++ b/src/ahriman/core/database/migrations/m000_initial.py
@@ -17,6 +17,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 #
+__all__ = ["steps"]
+
 
 steps = [
     """
diff --git a/src/ahriman/core/database/migrations/m001_package_source.py b/src/ahriman/core/database/migrations/m001_package_source.py
index 6c37f7a5..1429e26c 100644
--- a/src/ahriman/core/database/migrations/m001_package_source.py
+++ b/src/ahriman/core/database/migrations/m001_package_source.py
@@ -17,6 +17,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 #
+__all__ = ["steps"]
+
 
 steps = [
     """
diff --git a/src/ahriman/core/util.py b/src/ahriman/core/util.py
index 2ac0810b..aeadf92b 100644
--- a/src/ahriman/core/util.py
+++ b/src/ahriman/core/util.py
@@ -33,6 +33,10 @@ from ahriman.core.exceptions import InvalidOption, UnsafeRun
 from ahriman.models.repository_paths import RepositoryPaths
 
 
+__all__ = ["check_output", "check_user", "exception_response_text", "filter_json", "full_version", "package_like",
+           "pretty_datetime", "pretty_size", "tmpdir", "walk"]
+
+
 def check_output(*args: str, exception: Optional[Exception], cwd: Optional[Path] = None,
                  input_data: Optional[str] = None, logger: Optional[Logger] = None, user: Optional[int] = None) -> str:
     """
diff --git a/src/ahriman/web/middlewares/auth_handler.py b/src/ahriman/web/middlewares/auth_handler.py
index ad4d4ca5..40a029b7 100644
--- a/src/ahriman/web/middlewares/auth_handler.py
+++ b/src/ahriman/web/middlewares/auth_handler.py
@@ -36,6 +36,9 @@ from ahriman.models.user_identity import UserIdentity
 from ahriman.web.middlewares import HandlerType, MiddlewareType
 
 
+__all__ = ["AuthorizationPolicy", "auth_handler", "setup_auth"]
+
+
 class AuthorizationPolicy(aiohttp_security.AbstractAuthorizationPolicy):  # type: ignore
     """
     authorization policy implementation
diff --git a/src/ahriman/web/middlewares/exception_handler.py b/src/ahriman/web/middlewares/exception_handler.py
index dcd803f6..fb71e0e0 100644
--- a/src/ahriman/web/middlewares/exception_handler.py
+++ b/src/ahriman/web/middlewares/exception_handler.py
@@ -25,6 +25,9 @@ from logging import Logger
 from ahriman.web.middlewares import HandlerType, MiddlewareType
 
 
+__all__ = ["exception_handler"]
+
+
 def exception_handler(logger: Logger) -> MiddlewareType:
     """
     exception handler middleware. Just log any exception (except for client ones)
diff --git a/src/ahriman/web/routes.py b/src/ahriman/web/routes.py
index 4229d489..fcea5825 100644
--- a/src/ahriman/web/routes.py
+++ b/src/ahriman/web/routes.py
@@ -33,6 +33,9 @@ from ahriman.web.views.user.login import LoginView
 from ahriman.web.views.user.logout import LogoutView
 
 
+__all__ = ["setup_routes"]
+
+
 def setup_routes(application: Application, static_path: Path) -> None:
     """
     setup all defined routes
diff --git a/src/ahriman/web/web.py b/src/ahriman/web/web.py
index 233b7462..3ceb729b 100644
--- a/src/ahriman/web/web.py
+++ b/src/ahriman/web/web.py
@@ -33,6 +33,9 @@ from ahriman.web.middlewares.exception_handler import exception_handler
 from ahriman.web.routes import setup_routes
 
 
+__all__ = ["on_shutdown", "on_startup", "run_server", "setup_service"]
+
+
 async def on_shutdown(application: web.Application) -> None:
     """
     web application shutdown handler