diff --git a/etrack/__init__.py b/etrack/__init__.py
index f7a4541..2af67b8 100644
--- a/etrack/__init__.py
+++ b/etrack/__init__.py
@@ -1,2 +1,5 @@
 from .image_marker import ImageMarker, MarkerTask
-from .tracking_result import TrackingResult, coordinate_transformation
\ No newline at end of file
+from .tracking_result import TrackingResult, coordinate_transformation
+from .arena import Arena, Region
+from .tracking_data import TrackingData
+from .io.dlc_data import DLCReader
\ No newline at end of file