diff --git a/AKModel/models.py b/AKModel/models.py
index 05a5b28c36fc27303e29024494cc412e508c6c4c..ed2251271a8705c5059fd3ea9543e450dc7b26e0 100644
--- a/AKModel/models.py
+++ b/AKModel/models.py
@@ -410,7 +410,7 @@ class Event(models.Model):
             slot.start = start_timeslot.start
 
             solver_duration = (end_timeslot.end - start_timeslot.start).total_seconds() / 3600.0
-            assert solver_duration >= slot.duration
+            assert solver_duration + 1e-4 >= slot.duration
 
             slot.save()