diff --git a/src/pretix/api/serializers/event.py b/src/pretix/api/serializers/event.py
index 3ea81340ca..fce2793771 100644
--- a/src/pretix/api/serializers/event.py
+++ b/src/pretix/api/serializers/event.py
@@ -54,7 +54,7 @@ from pretix.base.models.items import SubEventItem, SubEventItemVariation
 from pretix.base.services.seating import (
     SeatProtected, generate_seats, validate_plan_change,
 )
-from pretix.base.settings import validate_event_settings
+from pretix.base.settings import LazyI18nStringList, validate_event_settings
 from pretix.base.signals import api_event_settings_fields
 
 logger = logging.getLogger(__name__)
@@ -789,6 +789,10 @@ class EventSettingsSerializer(SettingsSerializer):
         data = super().validate(data)
         settings_dict = self.instance.freeze()
         settings_dict.update(data)
+
+        if data.get('confirm_texts') is not None:
+            data['confirm_texts'] = LazyI18nStringList(data['confirm_texts'])
+
         validate_event_settings(self.event, settings_dict)
         return data
 
diff --git a/src/pretix/helpers/json.py b/src/pretix/helpers/json.py
index 6d2515292b..b73031573a 100644
--- a/src/pretix/helpers/json.py
+++ b/src/pretix/helpers/json.py
@@ -28,10 +28,14 @@ from pretix.base.reldate import RelativeDateWrapper
 
 class CustomJSONEncoder(I18nJSONEncoder):
     def default(self, obj):
+        from pretix.base.settings import LazyI18nStringList
+
         if isinstance(obj, RelativeDateWrapper):
             return obj.to_string()
         elif isinstance(obj, File):
             return obj.name
+        elif isinstance(obj, LazyI18nStringList):
+            return [s.data for s in obj.data]
         if isinstance(obj, PhoneNumber):
             return str(obj)
         else:
diff --git a/src/tests/api/test_events.py b/src/tests/api/test_events.py
index 000c22da7a..789393458c 100644
--- a/src/tests/api/test_events.py
+++ b/src/tests/api/test_events.py
@@ -1212,7 +1212,12 @@ def test_patch_event_settings(token_client, organizer, event):
         resp = token_client.patch(
             '/api/v1/organizers/{}/events/{}/settings/'.format(organizer.slug, event.slug),
             {
-                'imprint_url': 'https://example.com'
+                'imprint_url': 'https://example.com',
+                'confirm_texts': [
+                    {
+                        'de': 'Ich bin mit den AGB einverstanden.'
+                    }
+                ]
             },
             format='json'
         )