diff --git a/src/redturtle/prenotazioni/browser/prenotazioni_context_state.py b/src/redturtle/prenotazioni/browser/prenotazioni_context_state.py
index 1210697f..3d9c9dff 100644
--- a/src/redturtle/prenotazioni/browser/prenotazioni_context_state.py
+++ b/src/redturtle/prenotazioni/browser/prenotazioni_context_state.py
@@ -834,7 +834,7 @@ def booking_type_durations(self):
     def get_booking_type_duration(self, booking_type):
         """Return the seconds for this booking_type"""
         if type(booking_type) is BookingType:
-            return booking_type.duration * 60
+            return int(booking_type.duration) * 60
 
         if type(booking_type) is str:
             return self.booking_type_durations.get(booking_type, 1)
diff --git a/src/redturtle/prenotazioni/upgrades.py b/src/redturtle/prenotazioni/upgrades.py
index e0d2f953..66825a0c 100644
--- a/src/redturtle/prenotazioni/upgrades.py
+++ b/src/redturtle/prenotazioni/upgrades.py
@@ -481,7 +481,7 @@ def to_2000(context):
             booking_type = api.content.create(
                 type="BookingType",
                 title=type.get("name"),
-                duration=int(type.get("duration")),
+                duration=type.get("duration"),
                 hidden=type.get("hidden"),
                 container=obj,
                 # gates=["all"],