diff --git a/webstrom/settings.py b/webstrom/settings.py
index d5056633..1ffca093 100644
--- a/webstrom/settings.py
+++ b/webstrom/settings.py
@@ -109,7 +109,6 @@
     'DEFAULT_AUTHENTICATION_CLASSES': (
         'rest_framework.authentication.SessionAuthentication',
     ),
-    'DATETIME_FORMAT': "%Y-%m-%dT%H:%M:%S.%fZ",
     'DEFAULT_SCHEMA_CLASS': 'rest_framework.schemas.coreapi.AutoSchema'
 }