diff --git a/src/pretalx/api/serializers/event.py b/src/pretalx/api/serializers/event.py
index 17aaecb239..bb35b66d3e 100644
--- a/src/pretalx/api/serializers/event.py
+++ b/src/pretalx/api/serializers/event.py
@@ -1,9 +1,11 @@
 from rest_framework.serializers import ModelSerializer
 from urlman.serializers import UrlManField
 
+from pretalx.api.versions import SUPPORTED_VERSIONS, register_serializer
 from pretalx.event.models import Event
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class EventSerializer(ModelSerializer):
     urls = UrlManField(urls=["base", "schedule", "login", "feed"])
 
diff --git a/src/pretalx/api/serializers/question.py b/src/pretalx/api/serializers/question.py
index 401695c5c4..c071343ce3 100644
--- a/src/pretalx/api/serializers/question.py
+++ b/src/pretalx/api/serializers/question.py
@@ -1,15 +1,18 @@
 from rest_framework.serializers import ModelSerializer, SlugRelatedField
 
+from pretalx.api.versions import SUPPORTED_VERSIONS, register_serializer
 from pretalx.person.models import User
 from pretalx.submission.models import Answer, AnswerOption, Question, Submission
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class AnswerOptionSerializer(ModelSerializer):
     class Meta:
         model = AnswerOption
         fields = ("id", "answer")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class QuestionSerializer(ModelSerializer):
     options = AnswerOptionSerializer(many=True, required=False)
 
@@ -36,12 +39,14 @@ class Meta:
         )
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class MinimalQuestionSerializer(ModelSerializer):
     class Meta:
         model = Question
         fields = ("id", "question")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class AnswerWriteSerializer(ModelSerializer):
     submission = SlugRelatedField(
         queryset=Submission.objects.none(),
@@ -88,6 +93,7 @@ class Meta:
         )
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class AnswerSerializer(AnswerWriteSerializer):
     question = MinimalQuestionSerializer(Question.objects.none())
 
diff --git a/src/pretalx/api/serializers/review.py b/src/pretalx/api/serializers/review.py
index 8131b8f1a8..59cca3b5ba 100644
--- a/src/pretalx/api/serializers/review.py
+++ b/src/pretalx/api/serializers/review.py
@@ -5,9 +5,11 @@
 )
 
 from pretalx.api.serializers.question import AnswerSerializer
+from pretalx.api.versions import SUPPORTED_VERSIONS, register_serializer
 from pretalx.submission.models import Answer, Review
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class AnonymousReviewSerializer(ModelSerializer):
     """Does not include the user and answer fields."""
 
@@ -25,6 +27,7 @@ class Meta:
         ]
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class ReviewSerializer(AnonymousReviewSerializer):
     user = SlugRelatedField(slug_field="name", read_only=True)
     answers = SerializerMethodField()
diff --git a/src/pretalx/api/serializers/room.py b/src/pretalx/api/serializers/room.py
index d2ac6012df..dd090d8950 100644
--- a/src/pretalx/api/serializers/room.py
+++ b/src/pretalx/api/serializers/room.py
@@ -1,9 +1,11 @@
 from i18nfield.rest_framework import I18nAwareModelSerializer
 from rest_framework.serializers import ModelSerializer, SerializerMethodField
 
+from pretalx.api.versions import SUPPORTED_VERSIONS, register_serializer
 from pretalx.schedule.models import Availability, Room
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class AvailabilitySerializer(ModelSerializer):
     allDay = SerializerMethodField()
 
@@ -15,6 +17,7 @@ class Meta:
         fields = ("id", "start", "end", "allDay")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class RoomSerializer(I18nAwareModelSerializer):
     url = SerializerMethodField()
 
@@ -26,6 +29,7 @@ class Meta:
         fields = ("id", "guid", "name", "description", "capacity", "position", "url")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class RoomOrgaSerializer(RoomSerializer):
     availabilities = AvailabilitySerializer(many=True)
 
diff --git a/src/pretalx/api/serializers/speaker.py b/src/pretalx/api/serializers/speaker.py
index b08b25dd20..058187f6bd 100644
--- a/src/pretalx/api/serializers/speaker.py
+++ b/src/pretalx/api/serializers/speaker.py
@@ -2,10 +2,12 @@
 
 from pretalx.api.serializers.question import AnswerSerializer
 from pretalx.api.serializers.room import AvailabilitySerializer
+from pretalx.api.versions import SUPPORTED_VERSIONS, register_serializer
 from pretalx.person.models import SpeakerProfile, User
 from pretalx.schedule.models import Availability
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class SubmitterSerializer(ModelSerializer):
     biography = SerializerMethodField()
 
@@ -25,11 +27,13 @@ class Meta:
         fields = ("code", "name", "biography", "avatar")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class SubmitterOrgaSerializer(SubmitterSerializer):
     class Meta(SubmitterSerializer.Meta):
         fields = SubmitterSerializer.Meta.fields + ("email",)
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class SpeakerSerializer(ModelSerializer):
     code = CharField(source="user.code")
     name = CharField(source="user.name")
@@ -63,6 +67,7 @@ class Meta:
         fields = ("code", "name", "biography", "submissions", "avatar")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class SpeakerOrgaSerializer(SpeakerSerializer):
     email = CharField(source="user.email")
     answers = SerializerMethodField()
@@ -90,6 +95,7 @@ class Meta(SpeakerSerializer.Meta):
         fields = SpeakerSerializer.Meta.fields + ("answers", "email", "availabilities")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class SpeakerReviewerSerializer(SpeakerOrgaSerializer):
     def answers_queryset(self, obj):
         return obj.reviewer_answers.all()
diff --git a/src/pretalx/api/serializers/submission.py b/src/pretalx/api/serializers/submission.py
index b37cd473ca..3d8db17e14 100644
--- a/src/pretalx/api/serializers/submission.py
+++ b/src/pretalx/api/serializers/submission.py
@@ -9,10 +9,12 @@
 
 from pretalx.api.serializers.question import AnswerSerializer
 from pretalx.api.serializers.speaker import SubmitterOrgaSerializer, SubmitterSerializer
+from pretalx.api.versions import SUPPORTED_VERSIONS, register_serializer
 from pretalx.schedule.models import Schedule, TalkSlot
 from pretalx.submission.models import Resource, Submission, SubmissionStates, Tag
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class ResourceSerializer(ModelSerializer):
     resource = SerializerMethodField()
 
@@ -25,6 +27,7 @@ class Meta:
         fields = ("resource", "description")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class SlotSerializer(I18nAwareModelSerializer):
     room = SlugRelatedField(slug_field="name", read_only=True)
     end = SerializerMethodField()
@@ -38,12 +41,14 @@ class Meta:
         fields = ("room_id", "room", "start", "end")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class BreakSerializer(SlotSerializer):
     class Meta:
         model = TalkSlot
         fields = ("room", "room_id", "start", "end", "description")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class SubmissionSerializer(I18nAwareModelSerializer):
     submission_type = SlugRelatedField(slug_field="name", read_only=True)
     track = SlugRelatedField(slug_field="name", read_only=True)
@@ -117,12 +122,14 @@ class Meta:
         ]
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class TagSerializer(I18nAwareModelSerializer):
     class Meta:
         model = Tag
         fields = ["id", "tag", "description", "color"]
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class SubmissionOrgaSerializer(SubmissionSerializer):
     answers = SerializerMethodField()
     tags = SerializerMethodField()
@@ -163,6 +170,7 @@ class Meta(SubmissionSerializer.Meta):
         ]
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class SubmissionReviewerSerializer(SubmissionOrgaSerializer):
     def answers_queryset(self, obj):
         return obj.reviewer_answers.all()
@@ -171,6 +179,7 @@ class Meta(SubmissionOrgaSerializer.Meta):
         pass
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class ScheduleListSerializer(ModelSerializer):
     version = SerializerMethodField()
 
@@ -183,6 +192,7 @@ class Meta:
         fields = ("version", "published")
 
 
+@register_serializer(SUPPORTED_VERSIONS)
 class ScheduleSerializer(ModelSerializer):
     slots = SubmissionSerializer(
         Submission.objects.none().filter(state=SubmissionStates.CONFIRMED), many=True
diff --git a/src/pretalx/api/views/event.py b/src/pretalx/api/views/event.py
index 7bd0e1b2f5..23e1a93b4d 100644
--- a/src/pretalx/api/views/event.py
+++ b/src/pretalx/api/views/event.py
@@ -1,11 +1,12 @@
 from django.http import Http404
 from rest_framework import viewsets
 
+from pretalx.api.mixins import PretalxViewSetMixin
 from pretalx.api.serializers.event import EventSerializer
 from pretalx.event.models import Event
 
 
-class EventViewSet(viewsets.ReadOnlyModelViewSet):
+class EventViewSet(PretalxViewSetMixin, viewsets.ReadOnlyModelViewSet):
     serializer_class = EventSerializer
     queryset = Event.objects.none()
     lookup_field = "slug"
diff --git a/src/pretalx/api/views/question.py b/src/pretalx/api/views/question.py
index 5ffaaa3d2f..25b17da472 100644
--- a/src/pretalx/api/views/question.py
+++ b/src/pretalx/api/views/question.py
@@ -2,6 +2,7 @@
 from rest_framework import viewsets
 from rest_framework.permissions import SAFE_METHODS
 
+from pretalx.api.mixins import PretalxViewSetMixin
 from pretalx.api.serializers.question import (
     AnswerSerializer,
     AnswerWriteSerializer,
@@ -31,7 +32,7 @@ def get_questions_for_user(event, user, include_inactive=False):
     return event.questions.none()
 
 
-class QuestionViewSet(viewsets.ModelViewSet):
+class QuestionViewSet(PretalxViewSetMixin, viewsets.ModelViewSet):
     queryset = Question.objects.none()
     serializer_class = QuestionSerializer
     write_permission_required = "orga.edit_question"
@@ -71,7 +72,7 @@ class Meta:
         fields = ("question", "submission", "person", "review")
 
 
-class AnswerViewSet(viewsets.ModelViewSet):
+class AnswerViewSet(PretalxViewSetMixin, viewsets.ModelViewSet):
     queryset = Answer.objects.none()
     serializer_class = AnswerSerializer
     write_permission_required = "orga.change_submissions"
@@ -89,7 +90,7 @@ def get_queryset(self):
             .select_related("question", "person", "review", "submission")
         )
 
-    def get_serializer_class(self):
+    def get_unversioned_serializer_class(self):
         if self.request.method in SAFE_METHODS:
             return self.serializer_class
         return AnswerWriteSerializer
diff --git a/src/pretalx/api/views/review.py b/src/pretalx/api/views/review.py
index e092c1997c..f55e6dd323 100644
--- a/src/pretalx/api/views/review.py
+++ b/src/pretalx/api/views/review.py
@@ -1,17 +1,18 @@
 from django.db import models
 from rest_framework import viewsets
 
+from pretalx.api.mixins import PretalxViewSetMixin
 from pretalx.api.serializers.review import AnonymousReviewSerializer, ReviewSerializer
 from pretalx.submission.models import Review
 from pretalx.submission.models.submission import SubmissionStates
 
 
-class ReviewViewSet(viewsets.ReadOnlyModelViewSet):
+class ReviewViewSet(PretalxViewSetMixin, viewsets.ReadOnlyModelViewSet):
     serializer_class = ReviewSerializer
     queryset = Review.objects.none()
     filterset_fields = ("submission__code",)
 
-    def get_serializer_class(self):
+    def get_unversioned_serializer_class(self):
         if not self.request.user.has_perm(
             "orga.view_reviewer_names", self.request.event
         ):
diff --git a/src/pretalx/api/views/room.py b/src/pretalx/api/views/room.py
index 1c2ab99d0f..16483eae53 100644
--- a/src/pretalx/api/views/room.py
+++ b/src/pretalx/api/views/room.py
@@ -1,5 +1,6 @@
 from rest_framework import pagination, viewsets
 
+from pretalx.api.mixins import PretalxViewSetMixin
 from pretalx.api.serializers.room import RoomOrgaSerializer, RoomSerializer
 from pretalx.schedule.models import Room
 
@@ -8,7 +9,7 @@ class RoomPagination(pagination.LimitOffsetPagination):
     default_limit = 100
 
 
-class RoomViewSet(viewsets.ReadOnlyModelViewSet):
+class RoomViewSet(PretalxViewSetMixin, viewsets.ReadOnlyModelViewSet):
     queryset = Room.objects.none()
     pagination_class = RoomPagination
 
@@ -17,7 +18,7 @@ def get_queryset(self):
             return self.request.event.rooms.all()
         return self.request.event.rooms.none()
 
-    def get_serializer_class(self):
+    def get_unversioned_serializer_class(self):
         if self.request.user.has_perm("orga.edit_room", self.request.event):
             return RoomOrgaSerializer
         return RoomSerializer
diff --git a/src/pretalx/api/views/speaker.py b/src/pretalx/api/views/speaker.py
index 04ca9eefb9..9de5afe444 100644
--- a/src/pretalx/api/views/speaker.py
+++ b/src/pretalx/api/views/speaker.py
@@ -1,6 +1,7 @@
 from django.utils.functional import cached_property
 from rest_framework import viewsets
 
+from pretalx.api.mixins import PretalxViewSetMixin
 from pretalx.api.serializers.speaker import (
     SpeakerOrgaSerializer,
     SpeakerReviewerSerializer,
@@ -9,7 +10,7 @@
 from pretalx.person.models import SpeakerProfile
 
 
-class SpeakerViewSet(viewsets.ReadOnlyModelViewSet):
+class SpeakerViewSet(PretalxViewSetMixin, viewsets.ReadOnlyModelViewSet):
     serializer_class = SpeakerSerializer
     queryset = SpeakerProfile.objects.none()
     lookup_field = "user__code__iexact"
@@ -20,7 +21,7 @@ class SpeakerViewSet(viewsets.ReadOnlyModelViewSet):
     def serializer_questions(self):
         return (self.request.query_params.get("questions") or "").split(",")
 
-    def get_serializer_class(self):
+    def get_unversioned_serializer_class(self):
         if self.request.user.has_perm("orga.change_submissions", self.request.event):
             return SpeakerOrgaSerializer
         if self.request.user.has_perm("orga.view_speakers", self.request.event):
diff --git a/src/pretalx/api/views/submission.py b/src/pretalx/api/views/submission.py
index 7b5dd2182d..5674023588 100644
--- a/src/pretalx/api/views/submission.py
+++ b/src/pretalx/api/views/submission.py
@@ -4,6 +4,7 @@
 from django_scopes import scopes_disabled
 from rest_framework import viewsets
 
+from pretalx.api.mixins import PretalxViewSetMixin
 from pretalx.api.serializers.submission import (
     ScheduleListSerializer,
     ScheduleSerializer,
@@ -25,7 +26,7 @@ class Meta:
             fields = ("state", "content_locale", "submission_type")
 
 
-class SubmissionViewSet(viewsets.ReadOnlyModelViewSet):
+class SubmissionViewSet(PretalxViewSetMixin, viewsets.ReadOnlyModelViewSet):
     serializer_class = SubmissionSerializer
     queryset = Submission.objects.none()
     lookup_field = "code__iexact"
@@ -52,7 +53,7 @@ def get_queryset(self):
             )
         return self.request.event.submissions.all()
 
-    def get_serializer_class(self):
+    def get_unversioned_serializer_class(self):
         if self.request.user.has_perm("orga.change_submissions", self.request.event):
             return SubmissionOrgaSerializer
         if self.request.user.has_perm("orga.view_submissions", self.request.event):
@@ -78,12 +79,12 @@ def get_serializer(self, *args, **kwargs):
         )
 
 
-class ScheduleViewSet(viewsets.ReadOnlyModelViewSet):
+class ScheduleViewSet(PretalxViewSetMixin, viewsets.ReadOnlyModelViewSet):
     serializer_class = ScheduleSerializer
     queryset = Schedule.objects.none()
     lookup_value_regex = "[^/]+"
 
-    def get_serializer_class(self):
+    def get_unversioned_serializer_class(self):
         if self.action == "list":
             return ScheduleListSerializer
         return ScheduleSerializer  # self.action == 'retrieve'
@@ -119,7 +120,7 @@ def get_queryset(self):
         return qs
 
 
-class TagViewSet(viewsets.ReadOnlyModelViewSet):
+class TagViewSet(PretalxViewSetMixin, viewsets.ReadOnlyModelViewSet):
     serializer_class = TagSerializer
     queryset = Tag.objects.none()
     lookup_field = "tag__iexact"