diff --git a/klausur-service/backend/grid_editor_helpers.py b/klausur-service/backend/grid_editor_helpers.py
index 32dbe14..6de3b3a 100644
--- a/klausur-service/backend/grid_editor_helpers.py
+++ b/klausur-service/backend/grid_editor_helpers.py
@@ -15,6 +15,7 @@ from typing import Any, Dict, List, Optional, Tuple
 import cv2
 import numpy as np
 
+from cv_vocab_types import PageZone
 from cv_words_first import _cluster_rows, _build_cells
 from cv_ocr_engines import _text_has_garbled_ipa