diff --git a/agent/__init__.py b/agent/__init__.py
index e46de30..6eafe88 100644
--- a/agent/__init__.py
+++ b/agent/__init__.py
@@ -1,4 +1,4 @@
-# -*- coding: utf8 -*-
+# -*- coding: utf-8 -*-
 from .mod_mikrotik import MikrotikTransmitter
 from .core import NasFailedResult, NasNetworkError
 from .structs import TariffStruct, AbonStruct
diff --git a/agent/core.py b/agent/core.py
index 91417dc..ad6d5f9 100644
--- a/agent/core.py
+++ b/agent/core.py
@@ -1,4 +1,4 @@
-# -*- coding: utf8 -*-
+# -*- coding: utf-8 -*-
 from abc import ABCMeta, abstractmethod
 from .structs import AbonStruct, TariffStruct
 
diff --git a/agent/structs.py b/agent/structs.py
index b00455b..e53d116 100644
--- a/agent/structs.py
+++ b/agent/structs.py
@@ -1,4 +1,4 @@
-# -*- coding: utf8 -*-
+# -*- coding: utf-8 -*-
 from abc import ABCMeta, abstractmethod
 from struct import pack, unpack, calcsize
 from .utils import int2ip, ip2int
diff --git a/agent/utils.py b/agent/utils.py
index d36a69a..b1b715b 100644
--- a/agent/utils.py
+++ b/agent/utils.py
@@ -1,4 +1,4 @@
-# -*- coding: utf8 -*-
+# -*- coding: utf-8 -*-
 import socket
 import struct
 
diff --git a/djing/utils/push_snmp_passw.py b/djing/utils/push_snmp_passw.py
index bdbcebc..7d9d181 100644
--- a/djing/utils/push_snmp_passw.py
+++ b/djing/utils/push_snmp_passw.py
@@ -1,4 +1,4 @@
-# -*- coding: utf8 -*-
+# -*- coding: utf-8 -*-
 import telnetlib
 from mydefs import ping
 from socket import error