diff --git a/specification/modules/third_party_invites.rst b/specification/modules/third_party_invites.rst
index 9a939143..df71d215 100644
--- a/specification/modules/third_party_invites.rst
+++ b/specification/modules/third_party_invites.rst
@@ -215,7 +215,7 @@ H1 MUST verify the request from H3 to ensure the ``signed`` property is correct
 as well as the ``key_validity_url`` as still being valid. This is done by making
 a request to the `identity server /isvalid`_ endpoint, using the provided URL
 rather than constructing a new one. The query string and response for the provided
-URL must match the identity service specification.
+URL must match the Identity Service Specification.
 
 The reason that no other homeserver may reject the event based on checking
 ``key_validity_url`` is that we must ensure event acceptance is deterministic.