diff --git a/src/tcviewer/mol_widget.py b/src/tcviewer/mol_widget.py
index 5c5625f..de4bba7 100644
--- a/src/tcviewer/mol_widget.py
+++ b/src/tcviewer/mol_widget.py
@@ -377,7 +377,7 @@ def __init__(self):
         self.renWin.AddRenderer(self._base_ren)
 
         self.Initialize()
-        # self.Start()
+        self.Start()
 
         self._recording_mouse = False
         self._mouse_pos = None