diff --git a/packages/authentication-oauth/src/index.ts b/packages/authentication-oauth/src/index.ts
index 4bad654100..3d45fdeba4 100644
--- a/packages/authentication-oauth/src/index.ts
+++ b/packages/authentication-oauth/src/index.ts
@@ -41,14 +41,14 @@ export const setup = (options: OauthSetupSettings) => (app: Application) => {
     }
   }
 
-  const grant = defaultsDeep({}, omit(oauth, ['redirect', 'origins']), {
+  const grant = defaultsDeep({
     defaults: {
       prefix,
-      origin: `${protocol}://${host}`,
-      transport: 'session',
+      origin: `${oauth?.defaults?.protocol ?? protocol}://${oauth?.defaults?.host ?? host}`,
+      transport:  oauth?.defaults?.transport ?? 'session',
       response: ['tokens', 'raw', 'profile']
     }
-  });
+  }, omit(oauth, ['redirect', 'origins']));
 
   const getUrl = (url: string) => {
     const { defaults } = grant;