diff --git a/data/event-schemas/schema/core-event-schema/msgtype_infos/image_info.yaml b/data/event-schemas/schema/core-event-schema/msgtype_infos/image_info.yaml
index 9607d6fd..7cbfcc87 100644
--- a/data/event-schemas/schema/core-event-schema/msgtype_infos/image_info.yaml
+++ b/data/event-schemas/schema/core-event-schema/msgtype_infos/image_info.yaml
@@ -1,4 +1,3 @@
-$schema: http://json-schema.org/draft-04/schema#
 description: Metadata about an image.
 properties:
   h:
diff --git a/data/event-schemas/schema/core-event-schema/msgtype_infos/thumbnail_info.yaml b/data/event-schemas/schema/core-event-schema/msgtype_infos/thumbnail_info.yaml
index 79f7c253..31a3b1b2 100644
--- a/data/event-schemas/schema/core-event-schema/msgtype_infos/thumbnail_info.yaml
+++ b/data/event-schemas/schema/core-event-schema/msgtype_infos/thumbnail_info.yaml
@@ -1,4 +1,3 @@
-$schema: http://json-schema.org/draft-04/schema#
 description: Metadata about a thumbnail image.
 properties:
   h:
diff --git a/data/event-schemas/schema/m.room.third_party_invite.yaml b/data/event-schemas/schema/m.room.third_party_invite.yaml
index 7a00616b..bb4883f5 100644
--- a/data/event-schemas/schema/m.room.third_party_invite.yaml
+++ b/data/event-schemas/schema/m.room.third_party_invite.yaml
@@ -1,5 +1,4 @@
 ---
-$schema: http://json-schema.org/draft-04/schema#
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: "Acts as an `m.room.member` invite event, where there isn't a target user_id to invite. This event contains a token and a public key whose private key must be used to sign the token. Any user who can present that signature may use this invitation to join the target room."