diff --git a/oxford_spires_utils/trajectory/json_handler.py b/oxford_spires_utils/trajectory/json_handler.py
index ab4cde6..4c4fb6b 100644
--- a/oxford_spires_utils/trajectory/json_handler.py
+++ b/oxford_spires_utils/trajectory/json_handler.py
@@ -3,6 +3,7 @@
 from pathlib import Path
 
 import numpy as np
+
 from oxford_spires_utils.trajectory.json_handler_submap_utils import get_xyz, save_submap_cluster, viz_submap_cluster