diff --git a/cython/python_solvespace/__init__.py b/cython/python_solvespace/__init__.py
index 520eb113..1e4a1b42 100644
--- a/cython/python_solvespace/__init__.py
+++ b/cython/python_solvespace/__init__.py
@@ -8,7 +8,7 @@ __author__ = "Yuan Chang"
 __copyright__ = "Copyright (C) 2016-2019"
 __license__ = "GPLv3+"
 __email__ = "pyslvs@gmail.com"
-__version__ = "3.0.0.post4"
+__version__ = "3.0.0.post5"
 
 from .slvs import (
     quaternion_u,
diff --git a/cython/setup.py b/cython/setup.py
index 9f73c3e3..1de21adb 100644
--- a/cython/setup.py
+++ b/cython/setup.py
@@ -152,7 +152,9 @@ setup(
     install_requires=read('requirements.txt').splitlines(),
     test_suite="tests",
     classifiers=[
-        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
         "Programming Language :: Cython",
         "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
         "Operating System :: OS Independent",