diff --git a/synapse/rest/admin/rooms.py b/synapse/rest/admin/rooms.py
index 2d4da38db9..0659f22a89 100644
--- a/synapse/rest/admin/rooms.py
+++ b/synapse/rest/admin/rooms.py
@@ -444,7 +444,7 @@ class RoomStateRestServlet(RestServlet):
event_ids = await self._storage_controllers.state.get_current_state_ids(room_id)
events = await self.store.get_events(event_ids.values())
now = self.clock.time_msec()
- room_state = self._event_serializer.serialize_events(events.values(), now)
+ room_state = await self._event_serializer.serialize_events(events.values(), now)
ret = {"state": room_state}
return HTTPStatus.OK, ret
@@ -789,22 +789,22 @@ class RoomEventContextServlet(RestServlet):
time_now = self.clock.time_msec()
results = {
- "events_before": self._event_serializer.serialize_events(
+ "events_before": await self._event_serializer.serialize_events(
event_context.events_before,
time_now,
bundle_aggregations=event_context.aggregations,
),
- "event": self._event_serializer.serialize_event(
+ "event": await self._event_serializer.serialize_event(
event_context.event,
time_now,
bundle_aggregations=event_context.aggregations,
),
- "events_after": self._event_serializer.serialize_events(
+ "events_after": await self._event_serializer.serialize_events(
event_context.events_after,
time_now,
bundle_aggregations=event_context.aggregations,
),
- "state": self._event_serializer.serialize_events(
+ "state": await self._event_serializer.serialize_events(
event_context.state, time_now
),
"start": event_context.start,
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