diff --git a/packages/oauth2/src/metadata/authorization-server/v-authorization-server-metadata.ts b/packages/oauth2/src/metadata/authorization-server/v-authorization-server-metadata.ts
index f001934..67c2277 100644
--- a/packages/oauth2/src/metadata/authorization-server/v-authorization-server-metadata.ts
+++ b/packages/oauth2/src/metadata/authorization-server/v-authorization-server-metadata.ts
@@ -5,7 +5,10 @@ import { vAlgValueNotNone } from '../../common/v-common'
 export const vAuthorizationServerMetadata = v.pipe(
   v.looseObject({
     issuer: vHttpsUrl,
+
     token_endpoint: vHttpsUrl,
+    token_endpoint_auth_methods_supported: v.optional(v.array(v.string())),
+
     authorization_endpoint: v.optional(vHttpsUrl),
 
     jwks_uri: v.optional(vHttpsUrl),