diff --git a/py/BUILD.bazel b/py/BUILD.bazel
index 95bc85084095f..4537f6b9a6e14 100644
--- a/py/BUILD.bazel
+++ b/py/BUILD.bazel
@@ -62,7 +62,7 @@ compile_pip_requirements(
     ],
 )
 
-SE_VERSION = "4.28.0.202411252021"
+SE_VERSION = "4.27.1"
 
 BROWSER_VERSIONS = [
     "v85",
diff --git a/py/CHANGES b/py/CHANGES
index c0db6781b2ec8..ea3cdf8db4397 100644
--- a/py/CHANGES
+++ b/py/CHANGES
@@ -1,3 +1,7 @@
+Selenium 4.27.1
+* Fix `pyproject.toml` for installable from sdist (#14806)
+* Revert the Deprecation warnings of WebElement.get_attribute() (#14808)
+
 Selenium 4.27.0
 * Add CDP for Chrome 131 and remove 128
 * Add Firefox CDP deprecation warnings (#14787)
diff --git a/py/docs/source/conf.py b/py/docs/source/conf.py
index a849406e4f2bf..4e78039a603c0 100644
--- a/py/docs/source/conf.py
+++ b/py/docs/source/conf.py
@@ -56,9 +56,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '4.28'
+version = '4.27'
 # The full version, including alpha/beta/rc tags.
-release = '4.28.0.202411252021'
+release = '4.27.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/py/pyproject.toml b/py/pyproject.toml
index 7da47ebed42bb..4f7ee07119c2d 100644
--- a/py/pyproject.toml
+++ b/py/pyproject.toml
@@ -4,8 +4,8 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "selenium"
-version = "4.28.0.202411252021"
-license = "Apache 2.0"
+version = "4.27.1"
+license = { text = "Apache 2.0" }
 description = "Official Python bindings for Selenium WebDriver."
 readme = "README.rst"
 requires-python = "~=3.8"
@@ -24,6 +24,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     ]
 dependencies = [
     "urllib3[socks]>=1.26,<3",
@@ -40,7 +41,7 @@ zip-safe = false
 [tool.setuptools.packages.find]
 include = ["selenium*"]
 exclude = ["test*"]
-namespace = false
+namespaces = false
 # include-package-data is `true` by default in pyproject.toml
 
 [project.urls]
diff --git a/py/selenium/__init__.py b/py/selenium/__init__.py
index e3ff880df800d..2a9f1e1a9cdfb 100644
--- a/py/selenium/__init__.py
+++ b/py/selenium/__init__.py
@@ -16,4 +16,4 @@
 # under the License.
 
 
-__version__ = "4.28.0.202411252021"
+__version__ = "4.27.1"
diff --git a/py/selenium/webdriver/__init__.py b/py/selenium/webdriver/__init__.py
index febdae5a03698..8880c5a91ff21 100644
--- a/py/selenium/webdriver/__init__.py
+++ b/py/selenium/webdriver/__init__.py
@@ -44,7 +44,7 @@
 from .wpewebkit.service import Service as WPEWebKitService  # noqa
 from .wpewebkit.webdriver import WebDriver as WPEWebKit  # noqa
 
-__version__ = "4.28.0.202411252021"
+__version__ = "4.27.1"
 
 # We need an explicit __all__ because the above won't otherwise be exported.
 __all__ = [
diff --git a/py/tox.ini b/py/tox.ini
index 3ba7d4be20ccc..083da94651e71 100644
--- a/py/tox.ini
+++ b/py/tox.ini
@@ -1,5 +1,13 @@
 [tox]
-envlist = docs, flake8, isort
+envlist = docs, flake8, isort, validate-pyproject
+
+[testenv:validate-pyproject]
+skip_install = true
+deps =
+  validate-pyproject==0.23
+  packaging==24.2
+commands =
+  validate-pyproject ./pyproject.toml
 
 [testenv:docs]
 skip_install = true
@@ -7,10 +15,10 @@ deps =
   -r {toxinidir}/docs/requirements.txt
   -r {toxinidir}/requirements.txt
 
-commands = 
+commands =
   ; regenerate autodoc stub pages
   sphinx-autogen docs/source/api.rst
-  ; build api docs 
+  ; build api docs
   sphinx-build -b html -d ../build/docs/doctrees docs/source ../build/docs/api/py {posargs}
 setenv =
   PYTHONPATH = {toxinidir}/.