diff --git a/data/event-schemas/schema/m.room.message$m.location.yaml b/data/event-schemas/schema/m.room.message$m.location.yaml
index e0977079..bfe986d2 100644
--- a/data/event-schemas/schema/m.room.message$m.location.yaml
+++ b/data/event-schemas/schema/m.room.message$m.location.yaml
@@ -13,6 +13,7 @@ properties:
       geo_uri:
         description: A [geo URI (RFC5870)](https://datatracker.ietf.org/doc/html/rfc5870) representing this location.
         type: string
+        format: uri
       msgtype:
         enum:
           - m.location
@@ -25,6 +26,8 @@ properties:
               The URL to a thumbnail of the location being represented.
               Only present if the thumbnail is unencrypted.
             type: string
+            format: mx-mxc-uri
+            pattern: "^mxc:\\/\\/"
           thumbnail_file:
             description: |-
               Information on the encrypted thumbnail file, as specified in