diff --git a/src/pwo/__init__.py b/src/pwo/__init__.py
index 930dd82..b0d5e47 100644
--- a/src/pwo/__init__.py
+++ b/src/pwo/__init__.py
@@ -1 +1,9 @@
 from .private import format_filesize, async_retry, retry, async_test, ExceptionHandlerOutcome
+
+__all__ = [
+    'format_filesize',
+    'async_retry',
+    'retry',
+    'async_test',
+    'ExceptionHandlerOutcome'
+]