diff --git a/project/settings.py b/project/settings.py
index a450d5b2..10c5e93b 100644
--- a/project/settings.py
+++ b/project/settings.py
@@ -186,13 +186,16 @@ ACTIVE_LINK_STRICT = True
 # DRF settings
 
 REST_FRAMEWORK = {
-    'DEFAULT_AUTHENTICATION_CLASSES': [
+    'DEFAULT_AUTHENTICATION_CLASSES': (
         'rest_framework.authentication.TokenAuthentication',
         'rest_framework.authentication.SessionAuthentication',
-    ],
-    'DEFAULT_PERMISSION_CLASSES': [
+    ),
+    'DEFAULT_PERMISSION_CLASSES': (
         'rest_framework.permissions.AllowAny',
-    ],
+    ),
+    'DEFAULT_RENDERER_CLASSES': (
+        'rest_framework.renderers.JSONRenderer',
+    ),
     'DEFAULT_FILTER_BACKENDS': (
         'django_filters.rest_framework.DjangoFilterBackend',
         'rest_framework.filters.SearchFilter',