diff --git a/DESCRIPTION.rst b/DESCRIPTION.rst
index 5781779..2202c9e 100644
--- a/DESCRIPTION.rst
+++ b/DESCRIPTION.rst
@@ -2,10 +2,18 @@
 mchmm
 =====
 
-.. image:: https://travis-ci.org/maximtrp/mchmm.svg?branch=master
-    :target: https://travis-ci.org/maximtrp/mchmm
+.. image:: https://readthedocs.org/projects/mchmm/badge/?version=latest
+    :target: https://mchmm.readthedocs.io/en/latest/?badge=latest
 .. image:: https://img.shields.io/github/issues/maximtrp/mchmm.svg
     :target: https://github.com/maximtrp/mchmm/issues
+.. image:: https://codecov.io/gh/maximtrp/mchmm/branch/master/graph/badge.svg
+    :target: https://codecov.io/gh/maximtrp/mchmm
+.. image:: https://app.codacy.com/project/badge/Grade/d7881a827eb9473d89aa1fc10fdd855e
+    :target: https://www.codacy.com/gh/maximtrp/mchmm/dashboard
+.. image:: https://static.pepy.tech/badge/mchmm
+    :target: https://pepy.tech/project/mchmm
+.. image:: https://img.shields.io/pypi/v/mchmm.svg
+    :target: https://pypi.python.org/pypi/mchmm
 
 
 *mchmm* is a Python package implementing Markov chains and Hidden Markov models in pure NumPy and SciPy.
diff --git a/mchmm/__init__.py b/mchmm/__init__.py
index f3089d0..b018bd0 100644
--- a/mchmm/__init__.py
+++ b/mchmm/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.4.4"
+__version__ = "0.4.5"
 __all__ = ['MarkovChain', 'HiddenMarkovModel']
 
 from ._hmm import *  # noqa
diff --git a/pyproject.toml b/pyproject.toml
index d526354..a87ff5a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = "mchmm"
 dynamic = ["version"]
 description = "Markov chains and Hidden Markov models"
 readme = "DESCRIPTION.rst"
-requires-python = ">=3.6"
+requires-python = ">=3.9"
 keywords = ["statistics", "markov chains", "hidden markov models"]
 license.file = "LICENSE"
 authors = [{ name = "Maksim Terpilovskii", email = "maximtrp@gmail.com" }]
@@ -20,13 +20,11 @@ classifiers = [
     "Topic :: Scientific/Engineering :: Mathematics",
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.6",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
 ]
 urls.homepage = "https://github.com/maximtrp/mchmm"
 urls.documentation = "https://mchmm.rtfd.io"