diff --git a/citadel/indico_citadel/models/id_map.py b/citadel/indico_citadel/models/id_map.py
index 04d4a39..1a071c8 100644
--- a/citadel/indico_citadel/models/id_map.py
+++ b/citadel/indico_citadel/models/id_map.py
@@ -12,11 +12,11 @@ from indico.modules.events import Event
 from indico.modules.events.contributions import Contribution
 from indico.modules.events.contributions.models.subcontributions import SubContribution
 from indico.modules.events.notes.models.notes import EventNote
-from indico.util.enum import IndicoEnum
+from indico.util.enum import IndicoIntEnum
 from indico.util.string import format_repr
 
 
-class EntryType(int, IndicoEnum):
+class EntryType(IndicoIntEnum):
     event = 1
     contribution = 2
     subcontribution = 3
diff --git a/livesync/indico_livesync/models/queue.py b/livesync/indico_livesync/models/queue.py
index 70461c2..c75a691 100644
--- a/livesync/indico_livesync/models/queue.py
+++ b/livesync/indico_livesync/models/queue.py
@@ -11,14 +11,14 @@ from indico.core.db.sqlalchemy import PyIntEnum, UTCDateTime, db
 from indico.modules.attachments.models.attachments import Attachment
 from indico.modules.categories.models.categories import Category
 from indico.util.date_time import now_utc
-from indico.util.enum import IndicoEnum
+from indico.util.enum import IndicoIntEnum
 from indico.util.string import format_repr
 
 from indico_livesync.models.agents import LiveSyncAgent
 from indico_livesync.util import obj_deref
 
 
-class ChangeType(int, IndicoEnum):
+class ChangeType(IndicoIntEnum):
     created = 1
     deleted = 2
     moved = 3
@@ -30,7 +30,7 @@ class ChangeType(int, IndicoEnum):
     unpublished = 9
 
 
-class EntryType(int, IndicoEnum):
+class EntryType(IndicoIntEnum):
     category = 1
     event = 2
     contribution = 3
diff --git a/livesync/indico_livesync/simplify.py b/livesync/indico_livesync/simplify.py
index 87e061c..2c39aa5 100644
--- a/livesync/indico_livesync/simplify.py
+++ b/livesync/indico_livesync/simplify.py
@@ -19,13 +19,13 @@ from indico.modules.events.contributions.models.subcontributions import SubContr
 from indico.modules.events.models.events import Event
 from indico.modules.events.notes.models.notes import EventNote
 from indico.modules.events.sessions import Session
-from indico.util.enum import IndicoEnum
+from indico.util.enum import IndicoIntEnum
 
 from indico_livesync.models.queue import ChangeType, EntryType
 from indico_livesync.util import get_excluded_categories
 
 
-class SimpleChange(int, IndicoEnum):
+class SimpleChange(IndicoIntEnum):
     deleted = 1
     created = 2
     updated = 4
diff --git a/vc_zoom/indico_vc_zoom/util.py b/vc_zoom/indico_vc_zoom/util.py
index 7fee140..bd3b352 100644
--- a/vc_zoom/indico_vc_zoom/util.py
+++ b/vc_zoom/indico_vc_zoom/util.py
@@ -20,14 +20,14 @@ from indico.modules.users.util import get_user_by_email
 from indico.modules.vc.exceptions import VCRoomError, VCRoomNotFoundError
 from indico.util.caching import memoize_request
 from indico.util.date_time import now_utc
-from indico.util.enum import IndicoEnum, RichEnum
+from indico.util.enum import IndicoIntEnum, RichStrEnum
 from indico.util.user import principal_from_identifier
 
 from indico_vc_zoom import _
 from indico_vc_zoom.api import ZoomIndicoClient
 
 
-class ZoomMeetingType(int, IndicoEnum):
+class ZoomMeetingType(IndicoIntEnum):
     instant_meeting = 1
     scheduled_meeting = 2
     recurring_meeting_no_time = 3
@@ -38,7 +38,7 @@ class ZoomMeetingType(int, IndicoEnum):
     recurring_webinar_fixed_time = 9
 
 
-class UserLookupMode(str, RichEnum):
+class UserLookupMode(RichStrEnum):
     __titles__ = {
         'all_emails': _('All emails'),
         'email_domains': _('Email domains'),
@@ -47,7 +47,7 @@ class UserLookupMode(str, RichEnum):
 
     @property
     def title(self):
-        return RichEnum.title.__get__(self, type(self))
+        return RichStrEnum.title.__get__(self, type(self))
 
     all_emails = 'all_emails'
     email_domains = 'email_domains'