diff --git a/piptools/_compat/__init__.py b/piptools/_compat/__init__.py
index c715e19b3..657bc13c3 100644
--- a/piptools/_compat/__init__.py
+++ b/piptools/_compat/__init__.py
@@ -1,2 +1,3 @@
-# flake8: noqa
 from .pip_compat import PIP_VERSION, parse_requirements
+
+__all__ = ["PIP_VERSION", "parse_requirements"]
diff --git a/piptools/repositories/__init__.py b/piptools/repositories/__init__.py
index ce5142e8c..7caf5e4d5 100644
--- a/piptools/repositories/__init__.py
+++ b/piptools/repositories/__init__.py
@@ -1,3 +1,4 @@
-# flake8: noqa
 from .local import LocalRequirementsRepository
 from .pypi import PyPIRepository
+
+__all__ = ["LocalRequirementsRepository", "PyPIRepository"]
diff --git a/setup.cfg b/setup.cfg
index 5f30716e6..521c4215b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -78,6 +78,7 @@ disallow_untyped_calls = true
 disallow_untyped_decorators = true
 ignore_missing_imports = true
 no_implicit_optional = true
+no_implicit_reexport = true
 strict_equality = true
 warn_redundant_casts = true
 warn_return_any = true