diff --git a/PyMieSim/_gui.py b/PyMieSim/_gui.py
index 9b243ba4c..e2525e9e1 100644
--- a/PyMieSim/_gui.py
+++ b/PyMieSim/_gui.py
@@ -135,4 +135,4 @@ def run(self, host: str = "0.0.0.0", port: str = "8050", open_browser: bool = Fa
 
 if __name__ == '__main__':
     _gui = OpticalSetupGUI()
-    _gui.run(host='0.0.0.0', port='8050', open_browser=False, debug=False)
\ No newline at end of file
+    _gui.run(host='0.0.0.0', port='8050', open_browser=False, debug=True)
\ No newline at end of file