diff --git a/app.py b/app.py
index 94b2471..1e20ed9 100644
--- a/app.py
+++ b/app.py
@@ -54,7 +54,7 @@ def signup():
     params = {
         'response_type': 'code',
         'redirect_uri': get_redirect_uri(request),
-        'scopes': ','.join(config.get('scopes')),
+        'scope': ' '.join(config.get('scopes')),
     }
     url = generate_oauth_service().get_authorize_url(**params)
     return redirect(url)