diff --git a/klausur-service/backend/cv_cell_grid.py b/klausur-service/backend/cv_cell_grid.py
index 6480884..ef99dde 100644
--- a/klausur-service/backend/cv_cell_grid.py
+++ b/klausur-service/backend/cv_cell_grid.py
@@ -15,6 +15,8 @@ import numpy as np
 
 from cv_vocab_types import PageRegion, RowGeometry
 from cv_ocr_engines import (
+    RAPIDOCR_AVAILABLE,
+    _RE_ALPHA,
     _assign_row_words_to_columns,
     _attach_example_sentences,
     _clean_cell_text,