diff --git a/scripts/msc4191-auth-metadata.patch b/scripts/msc4191-auth-metadata.patch
new file mode 100644
index 0000000..3dfa381
--- /dev/null
+++ b/scripts/msc4191-auth-metadata.patch
@@ -0,0 +1,37 @@
+diff --git a/data/api/client-server/oauth_server_metadata.yaml b/data/api/client-server/oauth_server_metadata.yaml
+index 4cdb3aa6..2a49064e 100644
+--- a/data/api/client-server/oauth_server_metadata.yaml
++++ b/data/api/client-server/oauth_server_metadata.yaml
+@@ -139,6 +139,24 @@ paths:
+                     items:
+                       type: string
+                       description: A prompt value that the server supports.
++                  account_management_uri:
++                    type: string
++                    format: uri
++                    description: |-
++                      The URL where the user is able to access the account management capabilities of the homeserver.
++
++                        This is what is currently referred to as the "homeserver's web UI"
++
++                        MSC4191: Account management for OAuth 2.0 API
++                  account_management_actions_supported:
++                    type: array
++                    description: A JSON array of actions that the account management URL supports
++                    items:
++                      type: string
++                      description: |-
++                        Actions that the account management URL supports
++
++                        MSC4191: Account management for OAuth 2.0 API
+                 required:
+                   - issuer
+                   - authorization_endpoint
+@@ -149,6 +167,7 @@ paths:
+                   - grant_types_supported
+                   - response_modes_supported
+                   - code_challenge_methods_supported
++                additionalProperties: true
+                 example: {
+                   "issuer": "https://account.example.com/",
+                   "authorization_endpoint": "https://account.example.com/oauth2/auth",
diff --git a/scripts/prepare_matrix.sh b/scripts/prepare_matrix.sh
index 5d2f1d8..b88689e 100755
--- a/scripts/prepare_matrix.sh
+++ b/scripts/prepare_matrix.sh
@@ -49,6 +49,9 @@ git apply ../scripts/get-room-state.patch
 echo "Applying space hierarchy patch"
 git apply ../scripts/space-hierarchy.patch
 
+echo "Applying MSC4191 auth metadata patch"
+git apply ../scripts/msc4191-auth-metadata.patch
+
 )
 fi