diff --git a/abonapp/models.py b/abonapp/models.py
index d2b2408..00cfb73 100644
--- a/abonapp/models.py
+++ b/abonapp/models.py
@@ -97,7 +97,8 @@ class Abon(BaseAccount):
     device = models.ForeignKey('devapp.Device', null=True, blank=True, on_delete=models.SET_NULL)
     dev_port = models.ForeignKey('devapp.Port', null=True, blank=True, on_delete=models.SET_NULL)
     is_dynamic_ip = models.BooleanField(default=False)
-    nas = models.ForeignKey('nas_app.NASModel', null=True, blank=True, on_delete=models.SET_NULL, verbose_name=_('Network access server'), default=None)
+    nas = models.ForeignKey('nas_app.NASModel', null=True, blank=True, on_delete=models.SET_NULL,
+                            verbose_name=_('Network access server'), default=None)
 
     MARKER_FLAGS = (
         ('icon_donkey', _('Donkey')),
@@ -337,12 +338,13 @@ class AllTimePayLogManager(models.Manager):
     def by_days():
         cur = connection.cursor()
         cur.execute(
-            'SELECT SUM(summ) as alsum, DATE_FORMAT(date_add, "%Y-%m-%d") AS pay_date FROM  all_time_pay_log '
+            'SELECT SUM(summ) AS alsum, DATE_FORMAT(date_add, "%Y-%m-%d") AS pay_date FROM  all_time_pay_log '
             'GROUP BY DATE_FORMAT(date_add, "%Y-%m-%d")'
         )
         while True:
             r = cur.fetchone()
-            if r is None: break
+            if r is None:
+                break
             summ, dat = r
             yield {'summ': summ, 'pay_date': datetime.strptime(dat, '%Y-%m-%d')}
 
@@ -420,7 +422,7 @@ class PeriodicPayForId(models.Model):
     next_pay = models.DateTimeField(_('Next time to pay'))
     account = models.ForeignKey(Abon, on_delete=models.CASCADE, verbose_name=_('Account'))
 
-    def payment_for_service(self, author: UserProfile=None, now=None):
+    def payment_for_service(self, author: UserProfile = None, now=None):
         """
         Charge for the service and leave a log about it
         :param now: Current date, if now is None than it calculates in here
diff --git a/abonapp/views.py b/abonapp/views.py
index 89b244d..0a10700 100644
--- a/abonapp/views.py
+++ b/abonapp/views.py
@@ -13,8 +13,6 @@ from django.utils.translation import gettext_lazy as _
 from django.utils.decorators import method_decorator
 from django.views.generic import ListView, UpdateView, CreateView, DeleteView
 from django.conf import settings
-from djing.lib import DuplicateEntry
-from jsonview.decorators import json_view
 
 from agent.commands.dhcp import dhcp_commit, dhcp_expiry, dhcp_release
 from nas_app.models import NASModel
@@ -33,10 +31,11 @@ from guardian.shortcuts import get_objects_for_user, assign_perm
 from guardian.decorators import permission_required_or_403 as permission_required
 from djing import ping
 from djing import lib
+from djing.lib.decorators import json_view, only_admins
 from djing.global_base_views import OrderedFilteredList, SecureApiView
 
 
-login_decs = login_required, lib.decorators.only_admins
+login_decs = login_required, only_admins
 
 
 @method_decorator(login_decs, name='dispatch')
@@ -188,7 +187,7 @@ class DelAbonDeleteView(DeleteView):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.can_add_ballance')
 @transaction.atomic
 def abonamount(request, gid: int, uname):
@@ -260,7 +259,7 @@ class PayHistoryListView(OrderedFilteredList):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 def abon_services(request, gid: int, uname):
     grp = get_object_or_404(Group, pk=gid)
     if not request.user.has_perm('group_app.view_group', grp):
@@ -371,7 +370,7 @@ def terminal_pay(request):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.add_invoiceforpayment')
 def add_invoice(request, gid: int, uname: str):
     abon = get_object_or_404(models.Abon, username=uname)
@@ -408,7 +407,7 @@ def add_invoice(request, gid: int, uname: str):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.can_buy_tariff')
 @transaction.atomic
 def pick_tariff(request, gid: int, uname):
@@ -455,7 +454,7 @@ def pick_tariff(request, gid: int, uname):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.can_complete_service')
 def unsubscribe_service(request, gid: int, uname, abon_tariff_id: int):
     try:
@@ -553,7 +552,7 @@ class PassportUpdateView(UpdateView):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 def chgroup_tariff(request, gid):
     grp = get_object_or_404(Group, pk=gid)
     if not request.user.has_perm('group_app.change_group', grp):
@@ -574,7 +573,7 @@ def chgroup_tariff(request, gid):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.change_abon')
 def dev(request, gid: int, uname):
     abon_dev = None
@@ -600,7 +599,7 @@ def dev(request, gid: int, uname):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.change_abon')
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 def clear_dev(request, gid: int, uname):
@@ -618,7 +617,7 @@ def clear_dev(request, gid: int, uname):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 def charts(request, gid: int, uname):
     high = 100
@@ -669,7 +668,7 @@ def charts(request, gid: int, uname):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.can_ping')
 @json_view
 def abon_ping(request, gid: int, uname):
@@ -722,7 +721,7 @@ def abon_ping(request, gid: int, uname):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 def vcards(r):
     users = models.Abon.objects.exclude(group=None).select_related('group', 'street').only(
         'username', 'fio', 'group__title', 'telephone',
@@ -807,7 +806,7 @@ class DialsListView(OrderedFilteredList):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.change_abon')
 def save_user_dev_port(request, gid: int, uname):
     if request.method != 'POST':
@@ -854,7 +853,7 @@ def save_user_dev_port(request, gid: int, uname):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.add_abonstreet')
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 def street_add(request, gid):
@@ -875,7 +874,7 @@ def street_add(request, gid):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.change_abonstreet')
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 def street_edit(request, gid):
@@ -899,7 +898,7 @@ def street_edit(request, gid):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.delete_abonstreet')
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 def street_del(request, gid: int, sid: int):
@@ -912,7 +911,7 @@ def street_del(request, gid: int, sid: int):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 def active_nets(request, gid):
     nets = NetworkModel.objects.filter(groups__id=gid)
@@ -922,7 +921,7 @@ def active_nets(request, gid):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.view_additionaltelephones')
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 def tels(request, gid: int, uname):
@@ -936,7 +935,7 @@ def tels(request, gid: int, uname):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.add_additionaltelephone')
 def tel_add(request, gid: int, uname):
     if request.method == 'POST':
@@ -960,7 +959,7 @@ def tel_add(request, gid: int, uname):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.delete_additionaltelephone')
 def tel_del(request, gid: int, uname):
     try:
@@ -974,7 +973,7 @@ def tel_del(request, gid: int, uname):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 def phonebook(request, gid):
     res_format = request.GET.get('f')
@@ -997,7 +996,7 @@ def phonebook(request, gid):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 def abon_export(request, gid):
     res_format = request.GET.get('f')
@@ -1033,7 +1032,7 @@ def abon_export(request, gid):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 def fin_report(request):
     q = models.AllTimePayLog.objects.by_days()
     res_format = request.GET.get('f')
@@ -1051,7 +1050,7 @@ def fin_report(request):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 def add_edit_periodic_pay(request, gid: int, uname, periodic_pay_id=0):
     if periodic_pay_id == 0:
@@ -1083,7 +1082,7 @@ def add_edit_periodic_pay(request, gid: int, uname, periodic_pay_id=0):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('group_app.view_group', (Group, 'pk', 'gid'))
 @permission_required('abonapp.delete_periodicpayforid')
 def del_periodic_pay(request, gid: int, uname, periodic_pay_id):
@@ -1129,7 +1128,7 @@ class EditSibscriberMarkers(UpdateView):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.change_abon')
 def user_session_toggle(request, gid: int, uname, lease_id: int, action=None):
     abon = get_object_or_404(models.Abon, username=uname)
@@ -1160,7 +1159,7 @@ def user_session_toggle(request, gid: int, uname, lease_id: int, action=None):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.change_abon')
 def lease_add(request, gid: int, uname):
     group = get_object_or_404(Group, pk=gid)
@@ -1206,7 +1205,7 @@ def lease_add(request, gid: int, uname):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @permission_required('abonapp.change_abon')
 def attach_nas(request, gid):
     if request.method == 'POST':
@@ -1230,7 +1229,7 @@ def attach_nas(request, gid):
 
 # API's
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @json_view
 def abons(request):
     ablist = ({
@@ -1255,7 +1254,7 @@ def abons(request):
 
 
 @login_required
-@lib.decorators.only_admins
+@only_admins
 @json_view
 def search_abon(request):
     word = request.GET.get('s')
@@ -1310,7 +1309,7 @@ class DhcpLever(SecureApiView):
         except lib.LogicError as e:
             print('LogicError', e)
             return str(e)
-        except DuplicateEntry as e:
+        except lib.DuplicateEntry as e:
             print('Duplicate:', e)
             return str(e)
 
diff --git a/devapp/views.py b/devapp/views.py
index f481cc9..314efab 100644
--- a/devapp/views.py
+++ b/devapp/views.py
@@ -4,7 +4,7 @@ from django.contrib.auth.decorators import login_required
 from django.core.exceptions import PermissionDenied
 from django.db import IntegrityError
 from django.db.models import Q, Count
-from django.http import HttpResponse, Http404, JsonResponse
+from django.http import HttpResponse, Http404
 from django.shortcuts import render, redirect, get_object_or_404, resolve_url
 from django.contrib import messages
 from django.utils.decorators import method_decorator
@@ -24,7 +24,7 @@ from guardian.decorators import permission_required_or_403 as permission_require
 from guardian.shortcuts import get_objects_for_user
 from chatbot.send_func import send_notify
 from chatbot.models import ChatException
-from jsonview.decorators import json_view
+from djing.lib.decorators import json_view
 from djing import global_base_views, MAC_ADDR_REGEX, ping, get_object_or_None
 from .models import Device, Port, DeviceDBException, DeviceMonitoringException
 from .forms import DeviceForm, PortForm, DeviceExtraDataForm
@@ -516,6 +516,7 @@ class GroupsListView(global_base_views.OrderedFilteredList):
 
 @login_required
 @only_admins
+@json_view
 def search_dev(request):
     word = request.GET.get('s')
     if word is None or word == '':
@@ -532,7 +533,7 @@ def search_dev(request):
             'id': device.pk,
             'text': "%s: %s" % (device.ip_address or '', device.comment)
         } for device in results)
-    return JsonResponse(results, safe=False)
+    return results
 
 
 @login_required
diff --git a/dialing_app/views.py b/dialing_app/views.py
index a7014f4..6fa6e08 100644
--- a/dialing_app/views.py
+++ b/dialing_app/views.py
@@ -11,13 +11,12 @@ from django.views.generic import ListView
 from guardian.decorators import permission_required_or_403 as permission_required
 from django.db.models import Q
 from django.conf import settings
-from jsonview.decorators import json_view
 
 from abonapp.models import Abon
 from djing.global_base_views import SecureApiView
 from djing import JSONType
 from djing.lib import safe_int
-from djing.lib.decorators import only_admins
+from djing.lib.decorators import only_admins, json_view
 from .models import AsteriskCDR, SMSModel, SMSOut
 from .forms import SMSOutForm
 
diff --git a/djing/lib/decorators.py b/djing/lib/decorators.py
index 0e5221e..cbdf61f 100644
--- a/djing/lib/decorators.py
+++ b/djing/lib/decorators.py
@@ -1,6 +1,6 @@
 from functools import wraps
 from django.conf import settings
-from django.http import HttpResponseRedirect, HttpResponseForbidden
+from django.http import HttpResponseRedirect, HttpResponseForbidden, JsonResponse
 from django.shortcuts import redirect
 
 from djing.lib import check_sign
@@ -92,3 +92,14 @@ class LazyInitMetaclass(type):
         setattr(new_class, '_lazy_init', real_init)
 
         return new_class
+
+
+# Wraps return data to JSON
+def json_view(fn):
+    @wraps(fn)
+    def wrapped(request, *args, **kwargs):
+        r = fn(request, *args, **kwargs)
+        return JsonResponse(r, safe=False, json_dumps_params={
+            'ensure_ascii': False
+        })
+    return wrapped
diff --git a/mapapp/views.py b/mapapp/views.py
index 74c0034..11934b3 100644
--- a/mapapp/views.py
+++ b/mapapp/views.py
@@ -8,13 +8,12 @@ from django.utils.decorators import method_decorator
 from django.db.models import Count
 from django.views.generic import ListView
 from django.conf import settings
-from jsonview.decorators import json_view
 
 from group_app.models import Group
 from .models import Dot
 from .forms import DotForm
 from djing.lib import safe_int
-from djing.lib.decorators import only_admins
+from djing.lib.decorators import only_admins, json_view
 from devapp.models import Device
 from guardian.decorators import permission_required
 
diff --git a/nas_app/nas_managers/core.py b/nas_app/nas_managers/core.py
index 88c1547..457fe70 100644
--- a/nas_app/nas_managers/core.py
+++ b/nas_app/nas_managers/core.py
@@ -22,7 +22,7 @@ class BaseTransmitter(ABC):
         :return: Returnd a description of nas implementation
         """
 
-    def __init__(self, login: str, password: str, ip: str, port: int, *args, **kwargs):
+    def __init__(self, ip: str, *args, **kwargs):
         if not ping(ip):
             raise NasNetworkError('NAS %(ip_addr)s does not pinged' % {
                 'ip_addr': ip
@@ -34,34 +34,48 @@ class BaseTransmitter(ABC):
 
     @abstractmethod
     def add_user_range(self, user_list: VectorAbon):
-        """add subscribers list to NAS"""
+        """add subscribers list to NAS
+        :param user_list: Vector of instances of subscribers
+        """
 
     @abstractmethod
     def remove_user_range(self, users: VectorAbon):
-        """remove subscribers list"""
+        """remove subscribers list
+        :param users: Vector of instances of subscribers
+        """
 
     @abstractmethod
     def add_user(self, user: AbonStruct, *args):
-        """add subscriber"""
+        """add subscriber
+        :param user: Subscriber instance
+        """
 
     @abstractmethod
     def remove_user(self, user: AbonStruct):
-        """remove subscriber"""
+        """
+        remove subscriber
+        :param user: Subscriber instance
+        """
 
     @abstractmethod
     def update_user(self, user: AbonStruct, *args):
         """
         Update subscriber by uid, you can change everything except its uid.
         Subscriber will found by UID.
+        :param user: Subscriber instance
         """
 
     @abstractmethod
     def add_tariff_range(self, tariff_list: VectorTariff):
-        """Add services list to NAS."""
+        """Add services list to NAS.
+        :param tariff_list: Vector of TariffStruct
+        """
 
     @abstractmethod
     def remove_tariff_range(self, tariff_list: VectorTariff):
-        """Remove tariff list by unique id list."""
+        """Remove tariff list by unique id list.
+        :param tariff_list: Vector of TariffStruct
+        """
 
     @abstractmethod
     def add_tariff(self, tariff: TariffStruct):
@@ -72,6 +86,7 @@ class BaseTransmitter(ABC):
         """
         Update tariff by uid, you can change everything except its uid.
         Tariff will found by UID.
+        :param tariff: Service for update
         """
 
     @abstractmethod
@@ -97,6 +112,8 @@ class BaseTransmitter(ABC):
     def lease_free(self, user: AbonStruct, lease):
         """
         Remove ip lease from allowed to network
+        :param lease: ip_address for lease
+        :param user: Subscriber instance
         :return:
         """
 
@@ -104,6 +121,8 @@ class BaseTransmitter(ABC):
     def lease_start(self, user: AbonStruct, lease):
         """
         Starts ip lease to allowed to network
+        :param lease: ip_address for lease
+        :param user: Subscriber instance
         :return:
         """
 
@@ -112,7 +131,8 @@ class BaseTransmitter(ABC):
         :param users_from_db: QuerySet of all subscribers that can have service
         :return: Tuple of 2 lists that contain list to add users and list to remove users
         """
-        users_struct_gen = (ab.build_agent_struct(raise_errs=False) for ab in users_from_db if ab is not None and ab.is_access())
+        users_struct_gen = (ab.build_agent_struct(raise_errs=False) for ab in users_from_db if
+                            ab is not None and ab.is_access())
         users_struct_set = set(ab for ab in users_struct_gen if ab is not None and ab.tariff is not None)
         users_from_nas = set(self.read_users())
         if len(users_from_nas) < 1:
diff --git a/periodic.py b/periodic.py
index 182841e..ed40fae 100755
--- a/periodic.py
+++ b/periodic.py
@@ -23,11 +23,11 @@ class NasSyncThread(Thread):
     def run(self):
         try:
             tm = self.nas.get_nas_manager()
-            users = Abon.objects\
-                .annotate(ips_count=Count('ip_addresses'))\
-                .filter(is_active=True, ips_count__gt=0, nas=self.nas)\
-                .exclude(current_tariff=None)\
-                .prefetch_related('ip_addresses')\
+            users = Abon.objects \
+                .annotate(ips_count=Count('ip_addresses')) \
+                .filter(is_active=True, ips_count__gt=0, nas=self.nas) \
+                .exclude(current_tariff=None) \
+                .prefetch_related('ip_addresses') \
                 .iterator()
             tm.sync_nas(users)
         except NasNetworkError as er:
@@ -70,7 +70,9 @@ def main():
     old_leases.delete()
 
     # sync subscribers on NAS
-    threads = tuple(NasSyncThread(nas) for nas in NASModel.objects.annotate(usercount=Count('abon')).filter(usercount__gt=0))
+    threads = tuple(NasSyncThread(nas) for nas in NASModel.objects.
+                    annotate(usercount=Count('abon')).
+                    filter(usercount__gt=0))
     for t in threads:
         t.start()
     for t in threads:
diff --git a/requirements.txt b/requirements.txt
index 03ea6e3..9553b0e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,6 @@ django-jsonfield
 requests
 webdavclient
 pyst2
-django-jsonview
 django-bitfield
 transliterate
 asterisk
diff --git a/taskapp/views.py b/taskapp/views.py
index 32e86b8..2e928df 100644
--- a/taskapp/views.py
+++ b/taskapp/views.py
@@ -12,13 +12,12 @@ from datetime import datetime
 
 from django.views.generic.edit import FormMixin, DeleteView, UpdateView
 from guardian.decorators import permission_required_or_403 as permission_required
-from jsonview.decorators import json_view
 
 from chatbot.models import MessageQueue
 from abonapp.models import Abon
 from djing import httpresponse_to_referrer
 from djing.lib import safe_int, MultipleException, RuTimedelta
-from djing.lib.decorators import only_admins
+from djing.lib.decorators import only_admins, json_view
 from .handle import TaskException
 from .models import Task, ExtraComment
 from .forms import TaskFrm, ExtraCommentForm