diff --git a/examples/miniapps/application-multiple-containers/example/__main__.py b/examples/miniapps/application-multiple-containers/example/__main__.py
index e6e8e6ac..926d175b 100644
--- a/examples/miniapps/application-multiple-containers/example/__main__.py
+++ b/examples/miniapps/application-multiple-containers/example/__main__.py
@@ -15,7 +15,7 @@ def main(
         user_service: UserService = Provide[Application.services.user],
         auth_service: AuthService = Provide[Application.services.auth],
         photo_service: PhotoService = Provide[Application.services.photo],
-):
+) -> None:
     user = user_service.get_user(email)
     auth_service.authenticate(user, password)
     photo_service.upload_photo(user, photo)
diff --git a/examples/miniapps/application-single-container/example/__main__.py b/examples/miniapps/application-single-container/example/__main__.py
index d07fc3e5..9600fe66 100644
--- a/examples/miniapps/application-single-container/example/__main__.py
+++ b/examples/miniapps/application-single-container/example/__main__.py
@@ -15,7 +15,7 @@ def main(
         user_service: UserService = Provide[Container.user_service],
         auth_service: AuthService = Provide[Container.auth_service],
         photo_service: PhotoService = Provide[Container.photo_service],
-):
+) -> None:
     user = user_service.get_user(email)
     auth_service.authenticate(user, password)
     photo_service.upload_photo(user, photo)