diff --git a/jsoncsv/dumptool.py b/jsoncsv/dumptool.py
index 6208a8a..d3b85bb 100755
--- a/jsoncsv/dumptool.py
+++ b/jsoncsv/dumptool.py
@@ -3,7 +3,7 @@
 # 2015.10.09
 
 import six
-import csv
+import unicodecsv as csv
 import json
 import xlwt
 
diff --git a/jsoncsv/main.py b/jsoncsv/main.py
index 26131a8..63191a9 100644
--- a/jsoncsv/main.py
+++ b/jsoncsv/main.py
@@ -1,12 +1,10 @@
 # coding=utf-8
 
-import io
 import click
 import sys
 
 from jsoncsv import jsontool
 from jsoncsv import dumptool
-from jsoncsv import PY3
 from jsoncsv.dumptool import dump_excel
 from jsoncsv.jsontool import convert_json
 from jsoncsv.utils import separator_type
@@ -88,11 +86,8 @@ def jsoncsv(output, input, expand, restore, safe, separator):
     type=click.File('wb'),
     default=sys.stdout)
 def mkexcel(output, input, sort_, row, type_):
-    if type_ == "xls" and output == sys.stdout:
+    if output == sys.stdout:
         output = click.get_binary_stream('stdout')
-    if type_ == "csv" and output != sys.stdout:
-        if PY3:
-            output = io.TextIOWrapper(output)
 
     klass = dumptool.DumpCSV
     if type_ == "xls":
diff --git a/requirements.txt b/requirements.txt
index c530a96..4d87abe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 xlwt>=1.1.2
-click>=6.7
\ No newline at end of file
+click>=6.7
+unicodecsv>=0.14.1
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 333855b..03c7115 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
 
 setup(
     name='jsoncsv',
-    version='2.2.0a',
+    version='2.2.0b1',
     url='https://github.com/alingse/jsoncsv',
     description='A command tool easily convert json file to csv or xlsx.',
     long_description=readme,
@@ -30,6 +30,7 @@
         'Programming Language :: Python :: 3.6',
     ],
     install_requires=[
+        'unicodecsv',
         'xlwt',
         'click',
     ],
diff --git a/tests/test_mkexcel.py b/tests/test_mkexcel.py
index 93ac342..b7f59de 100644
--- a/tests/test_mkexcel.py
+++ b/tests/test_mkexcel.py
@@ -14,7 +14,7 @@ class TestDumpTool(unittest.TestCase):
     # FIXME (使用虚拟文件)
     def test_dumpexcel_csv(self):
         fin = open('./fixture/files/expand.1.json', 'r')
-        fout = open('./fixture/files/tmp.output.1.csv', 'w')
+        fout = open('./fixture/files/tmp.output.1.csv', 'wb')
 
         dump_excel(fin, fout, DumpCSV)
         fin.close()
@@ -30,7 +30,7 @@ def test_dumpexcel_csv(self):
 
     def test_dumpexcel_csv_with_sort(self):
         fin = open('./fixture/files/expand.1.json', 'r')
-        fout = open('./fixture/files/tmp.output.1.sort.csv', 'w')
+        fout = open('./fixture/files/tmp.output.1.sort.csv', 'wb')
 
         dump_excel(fin, fout, DumpCSV, sort_type=True)
         fin.close()
@@ -55,7 +55,7 @@ def test_dumpcexcel_xls(self):
 
     def test_dump_csv_with_non_ascii(self):
         fin = open('./fixture/files/expand.2.json', 'r')
-        fout = open('./fixture/files/tmp.output.2.csv', 'w')
+        fout = open('./fixture/files/tmp.output.2.csv', 'wb')
 
         dump_excel(fin, fout, DumpCSV)