diff --git a/note_kfet/settings/base.py b/note_kfet/settings/base.py
index 23bfe118..67948f09 100644
--- a/note_kfet/settings/base.py
+++ b/note_kfet/settings/base.py
@@ -239,6 +239,7 @@ REST_FRAMEWORK = {
     'DEFAULT_AUTHENTICATION_CLASSES': [
         'rest_framework.authentication.SessionAuthentication',
         'rest_framework.authentication.TokenAuthentication',
+        'oauth2_provider.contrib.rest_framework.OAuth2Authentication',
     ],
     'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
     'PAGE_SIZE': 20,