diff --git a/loginpass/_fastapi.py b/loginpass/_fastapi.py
index b18d72d..ef05920 100644
--- a/loginpass/_fastapi.py
+++ b/loginpass/_fastapi.py
@@ -18,7 +18,7 @@ def create_fastapi_routes(backends, oauth, handle_authorize):
 
         app.add_middleware(SessionMiddleware, secret_key=config.get("SECRET_KEY"))
 
-        def handle_authorize(remote, token, user_info, request):
+        async def handle_authorize(remote, token, user_info, request):
             return user_info
 
         router = create_fastapi_routes([GitHub, Google], oauth, handle_authorize)
@@ -63,13 +63,13 @@ async def auth(
             token = await remote.authorize_access_token(request)
         else:
             # handle failed
-            return handle_authorize(remote, None, None)
+            return await handle_authorize(remote, None, None)
         if "id_token" in token:
             user_info = await remote.parse_id_token(request, token)
         else:
             remote.token = token
             user_info = await remote.userinfo(token=token)
-        return handle_authorize(remote, token, user_info, request)
+        return await handle_authorize(remote, token, user_info, request)
 
     @router.get("/login/{backend}")
     async def login(backend: str, request: Request):