diff --git a/charon_vna/gui.py b/charon_vna/gui.py
index a5cda73..a561353 100644
--- a/charon_vna/gui.py
+++ b/charon_vna/gui.py
@@ -5,7 +5,6 @@ from typing import Callable, List, Tuple
 import matplotlib as mpl
 import numpy as np
 import xarray as xr
-from gui_helpers import FlowLayout
 from matplotlib import pyplot as plt
 from matplotlib.backends.backend_qtagg import FigureCanvasQTAgg
 from matplotlib.ticker import EngFormatter
@@ -23,7 +22,9 @@ from PySide6.QtWidgets import (
     QWidget,
 )
 from skrf import plotting as rf_plt
-from util import db20, s2vswr
+
+from charon_vna.gui_helpers import FlowLayout
+from charon_vna.util import db20, s2vswr
 
 # from vna import Charon
 
@@ -201,9 +202,14 @@ class MainWindow(QMainWindow):
         # TODO: load config
 
 
-app = QApplication(sys.argv)
+def main() -> None:
+    app = QApplication(sys.argv)
 
-window = MainWindow()
-window.show()
+    window = MainWindow()
+    window.show()
 
-app.exec()
+    app.exec()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/pyproject.toml b/pyproject.toml
index 9cb9d09..5d3043c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,8 @@ dynamic = ["version"]
 homepage = "https://git.brendanhaines.com/brendanhaines/charon"
 
 [project.scripts]
-# charon = "charon.charon:main"
+# charon-cli = "charon_vna.cli:main"
+charon-gui = "charon_vna.gui:main"
 
 [tool.setuptools_scm]
 version_file = "charon_vna/_version.py"