diff --git a/flasc/data_processing/northing_offset_change_hoger.py b/flasc/data_processing/northing_offset_change_hoger.py
index 59616595..8c567dd3 100644
--- a/flasc/data_processing/northing_offset_change_hoger.py
+++ b/flasc/data_processing/northing_offset_change_hoger.py
@@ -7,6 +7,8 @@
 CENER within the TWAIN project.
 """
 
+from __future__ import annotations
+
 import warnings
 from typing import Union