diff --git a/nerfview/__init__.py b/nerfview/__init__.py
index ef8c5dd..4c0558c 100644
--- a/nerfview/__init__.py
+++ b/nerfview/__init__.py
@@ -1,3 +1,12 @@
 from .render_panel import RenderTabState
 from .version import __version__
 from .viewer import VIEWER_LOCK, CameraState, Viewer, with_viewer_lock
+
+__all__ = [
+    "CameraState",
+    "RenderTabState",
+    "Viewer",
+    "VIEWER_LOCK",
+    "with_viewer_lock",
+    "__version__",
+]