diff --git a/httprunner/__init__.py b/httprunner/__init__.py
index e41047bc..8faea0d1 100644
--- a/httprunner/__init__.py
+++ b/httprunner/__init__.py
@@ -1 +1,3 @@
+# encoding: utf-8
+
 from httprunner.task import HttpRunner
diff --git a/httprunner/built_in.py b/httprunner/built_in.py
index b36df3f1..cafa4f32 100644
--- a/httprunner/built_in.py
+++ b/httprunner/built_in.py
@@ -1,6 +1,9 @@
+# encoding: utf-8
+
 """
 Built-in dependent functions used in YAML/JSON testcases.
 """
+
 import datetime
 import json
 import random
diff --git a/httprunner/cli.py b/httprunner/cli.py
index cdf77a20..93f259e0 100644
--- a/httprunner/cli.py
+++ b/httprunner/cli.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 import argparse
 import multiprocessing
 import os
diff --git a/httprunner/client.py b/httprunner/client.py
index c43f6f38..4d7ff73c 100644
--- a/httprunner/client.py
+++ b/httprunner/client.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 import re
 import time
 
diff --git a/httprunner/compat.py b/httprunner/compat.py
index 056c5aff..3753affc 100644
--- a/httprunner/compat.py
+++ b/httprunner/compat.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# encoding: utf-8
 
 """
 httprunner.compat
diff --git a/httprunner/context.py b/httprunner/context.py
index eded3e88..2aefee86 100644
--- a/httprunner/context.py
+++ b/httprunner/context.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 import copy
 import os
 import re
diff --git a/httprunner/events.py b/httprunner/events.py
index 34259967..b52928a2 100644
--- a/httprunner/events.py
+++ b/httprunner/events.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 class EventHook(object):
     """
     Simple event class used to provide hooks for different types of events in HttpRunner.
diff --git a/httprunner/exception.py b/httprunner/exception.py
index f9c13951..4bcef4d8 100644
--- a/httprunner/exception.py
+++ b/httprunner/exception.py
@@ -1,4 +1,5 @@
-#coding: utf-8
+# encoding: utf-8
+
 import json
 
 try:
diff --git a/httprunner/locusts.py b/httprunner/locusts.py
index 7702c6c6..0f4be04e 100644
--- a/httprunner/locusts.py
+++ b/httprunner/locusts.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 import io
 import multiprocessing
 import os
diff --git a/httprunner/logger.py b/httprunner/logger.py
index b2457c9e..9ea0700d 100644
--- a/httprunner/logger.py
+++ b/httprunner/logger.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 import logging
 import sys
 
diff --git a/httprunner/report.py b/httprunner/report.py
index b28245a0..cadb1ba0 100644
--- a/httprunner/report.py
+++ b/httprunner/report.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 import io
 import os
 import platform
diff --git a/httprunner/response.py b/httprunner/response.py
index 86e13e73..94a92e7a 100644
--- a/httprunner/response.py
+++ b/httprunner/response.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 import re
 
 from httprunner import exception, logger, testcase, utils
diff --git a/httprunner/runner.py b/httprunner/runner.py
index 9b74fc51..28972cb6 100644
--- a/httprunner/runner.py
+++ b/httprunner/runner.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 from unittest.case import SkipTest
 
 from httprunner import exception, logger, response, testcase, utils
diff --git a/httprunner/task.py b/httprunner/task.py
index 4636355f..f559fa74 100644
--- a/httprunner/task.py
+++ b/httprunner/task.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 import copy
 import sys
 import unittest
diff --git a/httprunner/testcase.py b/httprunner/testcase.py
index a8e303bb..f3727924 100644
--- a/httprunner/testcase.py
+++ b/httprunner/testcase.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 import ast
 import csv
 import io
diff --git a/httprunner/utils.py b/httprunner/utils.py
index 6bb1a1f1..d5762c44 100644
--- a/httprunner/utils.py
+++ b/httprunner/utils.py
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 import copy
 import hashlib
 import hmac