diff --git a/src/pam/operations/cropping.py b/src/pam/operations/cropping.py
index e7d1ce1b..0bff706b 100644
--- a/src/pam/operations/cropping.py
+++ b/src/pam/operations/cropping.py
@@ -8,7 +8,6 @@
 from pam.activity import Activity, Leg, Plan
 from pam.core import Population
 from pam.variables import END_OF_DAY, START_OF_DAY
-import pandas as pd
 
 
 def simplify_population(