diff --git a/CHANGELOG.md b/CHANGELOG.md
index 28497cdf..3cbb1476 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+## [2.9] - 2020-09-23
 ### Added
 - `notebook_check.py`
 - `to_array` method
@@ -506,7 +507,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - TPR
 - documents and `README.md`
 
-[Unreleased]: https://github.com/sepandhaghighi/pycm/compare/v2.8...dev
+[Unreleased]: https://github.com/sepandhaghighi/pycm/compare/v2.9...dev
+[2.9]: https://github.com/sepandhaghighi/pycm/compare/v2.8...v2.9
 [2.8]: https://github.com/sepandhaghighi/pycm/compare/v2.7...v2.8
 [2.7]: https://github.com/sepandhaghighi/pycm/compare/v2.6...v2.7
 [2.6]: https://github.com/sepandhaghighi/pycm/compare/v2.5...v2.6
diff --git a/Otherfiles/version_check.py b/Otherfiles/version_check.py
index ca386432..9f0f634d 100644
--- a/Otherfiles/version_check.py
+++ b/Otherfiles/version_check.py
@@ -4,7 +4,7 @@
 import sys
 import codecs
 Failed = 0
-PYCM_VERSION = "2.8"
+PYCM_VERSION = "2.9"
 
 
 SETUP_ITEMS = [
diff --git a/README.md b/README.md
index ecf62d36..5a465a87 100644
--- a/README.md
+++ b/README.md
@@ -99,7 +99,7 @@ PyCM is the swiss-army knife of confusion matrices, targeted mainly at data scie
 ⚠️  PyCM 2.4 is the last version to support **Python 2.7** & **Python 3.4**
 
 ### Source code
-- Download [Version 2.8](https://github.com/sepandhaghighi/pycm/archive/v2.8.zip) or [Latest Source ](https://github.com/sepandhaghighi/pycm/archive/dev.zip)
+- Download [Version 2.9](https://github.com/sepandhaghighi/pycm/archive/v2.9.zip) or [Latest Source ](https://github.com/sepandhaghighi/pycm/archive/dev.zip)
 - Run `pip install -r requirements.txt` or `pip3 install -r requirements.txt` (Need root access)
 - Run `python3 setup.py install` or `python setup.py install` (Need root access)				
 
@@ -107,7 +107,7 @@ PyCM is the swiss-army knife of confusion matrices, targeted mainly at data scie
 
 
 - Check [Python Packaging User Guide](https://packaging.python.org/installing/)     
-- Run `pip install pycm==2.8` or `pip3 install pycm==2.8` (Need root access)
+- Run `pip install pycm==2.9` or `pip3 install pycm==2.9` (Need root access)
 
 ### Conda
 
diff --git a/pycm/pycm_param.py b/pycm/pycm_param.py
index e1795ab3..292e74bb 100644
--- a/pycm/pycm_param.py
+++ b/pycm/pycm_param.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 """Parameters and constants."""
-PYCM_VERSION = "2.8"
+PYCM_VERSION = "2.9"
 
 
 OVERVIEW = '''
diff --git a/setup.py b/setup.py
index 1cf18ebb..acc138bd 100644
--- a/setup.py
+++ b/setup.py
@@ -36,14 +36,14 @@ def read_description():
 setup(
     name='pycm',
     packages=['pycm'],
-    version='2.8',
+    version='2.9',
     description='Multi-class confusion matrix library in Python',
     long_description=read_description(),
     long_description_content_type='text/markdown',
     author='Sepand Haghighi',
     author_email='info@pycm.ir',
     url='https://github.com/sepandhaghighi/pycm',
-    download_url='https://github.com/sepandhaghighi/pycm/tarball/v2.8',
+    download_url='https://github.com/sepandhaghighi/pycm/tarball/v2.9',
     keywords="confusion-matrix python3 python machine_learning ML",
     project_urls={
         'Webpage': 'https://www.pycm.ir',