diff --git a/oct_converter/readers/e2e.py b/oct_converter/readers/e2e.py
index 1784f9a..45296dd 100644
--- a/oct_converter/readers/e2e.py
+++ b/oct_converter/readers/e2e.py
@@ -3,7 +3,7 @@
 import time
 import warnings
 from collections import defaultdict
-from datetime import date, datetime, timedelta
+from datetime import date
 from itertools import chain
 from pathlib import Path