diff --git a/ogn/collect/logbook.py b/ogn/collect/logbook.py
index 2b7f282..d9af45d 100644
--- a/ogn/collect/logbook.py
+++ b/ogn/collect/logbook.py
@@ -2,7 +2,7 @@ from celery.utils.log import get_task_logger
 
 from sqlalchemy import and_, or_, insert, update, between, exists
 from sqlalchemy.sql import func, null
-from sqlalchemy.sql.expression import true, false, label
+from sqlalchemy.sql.expression import true, false
 
 from ogn.collect.celery import app
 from ogn.model import TakeoffLanding, Logbook
diff --git a/ogn/model/logbook.py b/ogn/model/logbook.py
index 2a85977..309f952 100644
--- a/ogn/model/logbook.py
+++ b/ogn/model/logbook.py
@@ -1,4 +1,4 @@
-from sqlalchemy import Integer, DateTime, Interval, Column, ForeignKey, case, null
+from sqlalchemy import Integer, DateTime, Column, ForeignKey, case, null
 from sqlalchemy.orm import relationship
 
 from .base import Base