diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -4,14 +4,14 @@ from setuptools import setup
 from sys import version_info
 
 ver = version_info[:3]
-if ver < (3, 6, 0):
-    raise SystemExit('Sorry! multio requires python 3.6.0 or later.')
+if ver < (3, 5, 2):
+    raise SystemExit('Sorry! multio requires python 3.5.2 or later.')
 
 setup(
     name='multio',
     description='multio - an unified async library for curio and trio',
     license='MIT',
-    version='0.2.2',
+    version='0.2.3',
     author='theelous3, SunDwarf, and Akuli',
     url='https://github.com/theelous3/multio',
     python_requires=">=3.5.2",
dropped min py ver requirement from <I>.x back to <I>