diff --git a/ORStools/gui/ORStoolsDialog.py b/ORStools/gui/ORStoolsDialog.py
index 3f5e0623..f672ce0c 100644
--- a/ORStools/gui/ORStoolsDialog.py
+++ b/ORStools/gui/ORStoolsDialog.py
@@ -231,7 +231,7 @@ def run_gui_control(self):
         layer_out.updateFields()
 
         # style output layer
-        qml_path = os.path.join(os.path.dirname(__file__), 'linestyle.qml')
+        qml_path = os.path.join(os.path.dirname(__file__), "linestyle.qml")
         layer_out.loadNamedStyle(qml_path, True)
         layer_out.triggerRepaint()