diff --git a/pyrelacs/app.py b/pyrelacs/app.py
index 288f8b1..7f98eca 100644
--- a/pyrelacs/app.py
+++ b/pyrelacs/app.py
@@ -137,8 +137,12 @@ class PyRelacs(QMainWindow):
         self.p = None
 
 
-if __name__ == "__main__":
+def main():
     app = QApplication(sys.argv)
     window = PyRelacs()
     window.show()
     app.exec()
+
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file