diff --git a/api/app/services/availability_service.py b/api/app/services/availability_service.py
index a05b43fd4..86d63f24e 100644
--- a/api/app/services/availability_service.py
+++ b/api/app/services/availability_service.py
@@ -76,6 +76,9 @@ def get_available_slots(office: Office, days: [datetime], format_time: bool = Tr
                             end_time = add_delta_to_time(end_time, minutes=appointment_duration,
                                                          timezone=office.timezone.timezone_name)
 
+                # Sort the slot by time for the day
+                available_slots_per_day[formatted_date].sort(key=lambda x: x['start_time'])
+
                 # Check if the slots are already booked
                 for actual_slot in available_slots_per_day[formatted_date]:
                     for booked_slot in grouped_appointments.get(formatted_date, []):
@@ -134,7 +137,6 @@ def group_appointments(appointments, timezone: str):
             })
         return filtered_appointments
 
-
     @staticmethod
     def prune_appointments(available_slots_per_day: Dict):
         for key, slots in available_slots_per_day.items():