diff --git a/README.md b/README.md
index abf3786..7ebd324 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ combine third party tools or implement new functionalities from scratch.
 
 ## Requirements
 
-**ml-stars** has been developed and tested on [Python 3.8, 3.9, 3.10, 3.11, 3.12, 3.13](https://www.python.org/downloads/)
+**ml-stars** has been developed and tested on [Python 3.8, 3.9, 3.10, 3.11, and 3.12](https://www.python.org/downloads/)
 
 Also, although it is not strictly required, the usage of a
 [virtualenv](https://virtualenv.pypa.io/en/latest/) is highly recommended in order to avoid
diff --git a/setup.py b/setup.py
index 22ea720..a0d2219 100644
--- a/setup.py
+++ b/setup.py
@@ -92,7 +92,6 @@
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
-        'Programming Language :: Python :: 3.13',    
     ],
     description='Primitives and Pipelines for Time Series Data.',
     entry_points={
@@ -114,7 +113,7 @@
     keywords='mlstars',
     name='ml-stars',
     packages=find_packages(include=['mlstars', 'mlstars.*']),
-    python_requires='>=3.8,<3.14',
+    python_requires='>=3.8,<3.13',
     setup_requires=setup_requires,
     test_suite='tests',
     tests_require=tests_require,
diff --git a/tox.ini b/tox.ini
index 48a84ce..4bbb7c7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = lint, docs, py3{8, 9, 10, 11, 12, 13}-{readme,pytest,minimum,tutorials}
+envlist = lint, docs, py3{8, 9, 10, 11, 12}-{readme,pytest,minimum,tutorials}
 
 [testenv]
 skipsdist = false