diff --git a/data/event-schemas/schema/m.room.power_levels.yaml b/data/event-schemas/schema/m.room.power_levels.yaml
index 3d04b954..a7f5d398 100644
--- a/data/event-schemas/schema/m.room.power_levels.yaml
+++ b/data/event-schemas/schema/m.room.power_levels.yaml
@@ -5,8 +5,6 @@ description: |-
   This event specifies the minimum level a user must have in order to perform a
   certain action. It also specifies the levels of each user in the room.
 
-  The allowed range of power levels is specified by the [Canonical JSON specification](/appendices/#canonical-json).
-
   If a `user_id` is in the `users` list, then that `user_id` has the
   associated power level. Otherwise they have the default level
   `users_default`. If `users_default` is not supplied, it is assumed to be
@@ -44,6 +42,9 @@ description: |-
   `m.room.power_levels` event as soon as it is created. See also the
   documentation of the `/createRoom` API.
 
+  Note: the allowed range for power level values is `[-(2**53)+1, (2**53)-1]`,
+  as specified by the [Canonical JSON specification](/appendices/#canonical-json).
+
 properties:
   content:
     properties: