diff --git a/smash/web/officeAvailability.py b/smash/web/officeAvailability.py
index 297ec4214045049b55cfd64565d3dcbc63995d53..3a22d1a3f84a6754769fca8c548b4a12b93c3754 100644
--- a/smash/web/officeAvailability.py
+++ b/smash/web/officeAvailability.py
@@ -3,7 +3,6 @@ import datetime
 from datetime import timedelta
 import logging
 import pandas as pd
-
 from web.utils import get_today_midnight_date
 from web.models.holiday import Holiday
 from web.models.availability import Availability
@@ -59,8 +58,9 @@ class OfficeAvailability(object):
 		Receives a pandas date_range `pd.date_range` object.
 		Sets the availability to one for the specific interval of the provided range.
 		'''
+		range = range.round(self.minimum_slot)
 		if only_working_hours:
-			range = range.to_series().between_time(self.office_start, self.office_end)
+			range = range.to_series().between_time(self.office_start, self.office_end).index
 		self.availability[range] = 1
 
 	def remove_availability(self, range, only_working_hours=False):
@@ -68,8 +68,9 @@ class OfficeAvailability(object):
 		Receives a pandas date_range `pd.date_range` object.
 		Sets the availability to zero for the specific interval of the provided range.
 		'''
+		range = range.round(self.minimum_slot)
 		if only_working_hours:
-			range = range.to_series().between_time(self.office_start, self.office_end)
+			range = range.to_series().between_time(self.office_start, self.office_end).index
 		self.availability[range] = 0
 
 	def consider_this(self, appointment_availability_or_holiday, only_working_hours=False):