diff --git a/tools/qupath_roi_splitter/qupath_roi_splitter.py b/tools/qupath_roi_splitter/qupath_roi_splitter.py
index a02c68d0e..1091d5af1 100644
--- a/tools/qupath_roi_splitter/qupath_roi_splitter.py
+++ b/tools/qupath_roi_splitter/qupath_roi_splitter.py
@@ -1,4 +1,5 @@
 import argparse
+
 import cv2
 import geojson
 import numpy as np