diff --git a/apps/common/serializers/mixin.py b/apps/common/serializers/mixin.py
index e8e1b48d2..583b15e5c 100644
--- a/apps/common/serializers/mixin.py
+++ b/apps/common/serializers/mixin.py
@@ -14,6 +14,7 @@ from rest_framework.exceptions import ValidationError
 from rest_framework.fields import SkipField, empty
 from rest_framework.settings import api_settings
 from rest_framework.utils import html
+from rest_framework_bulk.serializers import BulkListSerializer
 
 from common.db.fields import EncryptMixin
 from common.serializers.fields import (
@@ -72,7 +73,6 @@ class BulkSerializerMixin(object):
     """
 
     def to_internal_value(self, data):
-        from rest_framework_bulk import BulkListSerializer
 
         ret = super(BulkSerializerMixin, self).to_internal_value(data)
 
diff --git a/apps/users/filters.py b/apps/users/filters.py
index 6c8648e08..0d45b989f 100644
--- a/apps/users/filters.py
+++ b/apps/users/filters.py
@@ -52,7 +52,7 @@ class UserFilter(BaseFilterSet):
 
         if name == 'is_password_expired':
             key = 'date_password_last_updated'
-        elif name == 'long_time_no_login':
+        elif name == 'is_long_time_no_login':
             key = 'last_login'
         else:
             raise ValueError('Invalid filter name')