diff --git a/.github/workflows/lint-and-tests.yml b/.github/workflows/lint-and-tests.yml
index 2b3df85..6aae454 100644
--- a/.github/workflows/lint-and-tests.yml
+++ b/.github/workflows/lint-and-tests.yml
@@ -22,11 +22,11 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index aada480..7a9fc1c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -35,7 +35,7 @@ repos:
     hooks:
       - id: pyupgrade
         args:
-          - "--py38-plus"
+          - "--py39-plus"
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: "v0.6.9"
@@ -43,7 +43,7 @@ repos:
       - id: ruff
         args:
           - --fix-only
-          - --target-version=py38
+          - --target-version=py39
 
   - repo: https://github.com/pycqa/isort
     rev: 5.13.2
@@ -59,7 +59,7 @@ repos:
     hooks:
       - id: black
         args:
-          - --target-version=py38
+          - --target-version=py39
 
   - repo: https://github.com/pycqa/flake8
     rev: 7.1.1
diff --git a/mkdocs_rss_plugin/plugin.py b/mkdocs_rss_plugin/plugin.py
index 703c6c1..a9e7beb 100644
--- a/mkdocs_rss_plugin/plugin.py
+++ b/mkdocs_rss_plugin/plugin.py
@@ -11,7 +11,7 @@
 from email.utils import formatdate
 from pathlib import Path
 from re import compile as re_compile
-from typing import List, Literal, Optional
+from typing import Literal, Optional
 
 # 3rd party
 from jinja2 import Environment, FileSystemLoader, select_autoescape
@@ -79,7 +79,7 @@ def on_startup(
         # flag used command to disable some actions if serve is used
         self.cmd_is_serve = command == "serve"
 
-        self.pages_to_filter: List[PageInformation] = []
+        self.pages_to_filter: list[PageInformation] = []
         # prepare output feeds
         self.feed_created: dict = {}
         self.feed_updated: dict = {}
diff --git a/mkdocs_rss_plugin/timezoner_pre39.py b/mkdocs_rss_plugin/timezoner_pre39.py
deleted file mode 100644
index 36e309d..0000000
--- a/mkdocs_rss_plugin/timezoner_pre39.py
+++ /dev/null
@@ -1,56 +0,0 @@
-#! python3  # noqa: E265
-
-
-"""
-Manage timezones for pages date(time)s using pytz module.
-Meant to be dropped when Python 3.8 reaches EOL.
-"""
-
-# ############################################################################
-# ########## Libraries #############
-# ##################################
-
-# standard library
-from datetime import datetime
-
-# 3rd party
-import pytz
-from mkdocs.plugins import get_plugin_logger
-
-# package
-from mkdocs_rss_plugin.constants import MKDOCS_LOGGER_NAME
-
-# ############################################################################
-# ########## Globals #############
-# ################################
-
-
-logger = get_plugin_logger(MKDOCS_LOGGER_NAME)
-
-
-# ############################################################################
-# ########## Functions ###########
-# ################################
-
-
-def set_datetime_zoneinfo(
-    input_datetime: datetime, config_timezone: str = "UTC"
-) -> datetime:
-    """Apply timezone to a naive datetime.
-
-    :param input_datetime: offset-naive datetime
-    :type input_datetime: datetime
-    :param config_timezone: name of timezone as registered in IANA database,
-    defaults to "UTC". Example : Europe/Paris.
-    :type config_timezone: str, optional
-
-    :return: offset-aware datetime
-    :rtype: datetime
-    """
-    if input_datetime.tzinfo:
-        return input_datetime
-    elif not config_timezone:
-        return input_datetime.replace(tzinfo=pytz.utc)
-    else:
-        config_tz = pytz.timezone(config_timezone)
-        return config_tz.localize(input_datetime)
diff --git a/mkdocs_rss_plugin/util.py b/mkdocs_rss_plugin/util.py
index df00c72..1c14ab3 100644
--- a/mkdocs_rss_plugin/util.py
+++ b/mkdocs_rss_plugin/util.py
@@ -6,14 +6,13 @@
 
 # standard library
 import logging
-import sys
 from collections.abc import Iterable
 from datetime import date, datetime
 from email.utils import format_datetime
 from functools import lru_cache
 from mimetypes import guess_type
 from pathlib import Path
-from typing import Any, List, Tuple, Union
+from typing import Any, Union
 from urllib.parse import urlencode, urlparse, urlunparse
 
 # 3rd party
@@ -46,12 +45,7 @@
     IntegrationMaterialSocialCards,
 )
 from mkdocs_rss_plugin.models import PageInformation
-
-# conditional imports
-if sys.version_info < (3, 9):
-    from mkdocs_rss_plugin.timezoner_pre39 import set_datetime_zoneinfo
-else:
-    from mkdocs_rss_plugin.timezoner import set_datetime_zoneinfo
+from mkdocs_rss_plugin.timezoner import set_datetime_zoneinfo
 
 # ############################################################################
 # ########## Globals #############
@@ -202,7 +196,7 @@ def get_file_dates(
         meta_datetime_format: str,
         meta_default_time: datetime,
         meta_default_timezone: str,
-    ) -> Tuple[datetime, datetime]:
+    ) -> tuple[datetime, datetime]:
         """Extract creation and update dates from page metadata (yaml frontmatter) or
             git log for given file.
 
@@ -358,7 +352,7 @@ def get_file_dates(
                 get_build_datetime(),
             )
 
-    def get_authors_from_meta(self, in_page: Page) -> Optional[Tuple[str]]:
+    def get_authors_from_meta(self, in_page: Page) -> Optional[tuple[str]]:
         """Returns authors from page meta. It handles 'author' and 'authors' for keys, \
         str and iterable as values types.
 
@@ -542,7 +536,7 @@ def get_description_or_abstract(
             )
             return ""
 
-    def get_image(self, in_page: Page, base_url: str) -> Optional[Tuple[str, str, int]]:
+    def get_image(self, in_page: Page, base_url: str) -> Optional[tuple[str, str, int]]:
         """Get page's image from page meta or social cards and returns properties.
 
         Args:
@@ -782,7 +776,7 @@ def guess_locale(self, mkdocs_config: MkDocsConfig) -> Optional[str]:
         return None
 
     @staticmethod
-    def filter_pages(pages: List[PageInformation], attribute: str, length: int) -> list:
+    def filter_pages(pages: list[PageInformation], attribute: str, length: int) -> list:
         """Filter and return pages into a friendly RSS structure.
 
         Args:
diff --git a/setup.py b/setup.py
index 76b4b2a..87ff97d 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 # standard library
 from pathlib import Path
-from typing import List, Union
+from typing import Union
 
 # 3rd party
 from setuptools import find_packages, setup
@@ -26,7 +26,7 @@
 # ##################################
 
 
-def load_requirements(requirements_files: Union[Path, List[Path]]) -> list:
+def load_requirements(requirements_files: Union[Path, list[Path]]) -> list:
     """Helper to load requirements list from a path or a list of paths.
 
     Args:
@@ -79,7 +79,7 @@ def load_requirements(requirements_files: Union[Path, List[Path]]) -> list:
     # run
     entry_points={"mkdocs.plugins": ["rss = mkdocs_rss_plugin.plugin:GitRssPlugin"]},
     # dependencies
-    python_requires=">=3.8, <4",
+    python_requires=">=3.9, <4",
     extras_require={
         # tooling
         "dev": load_requirements(HERE / "requirements/development.txt"),
@@ -93,11 +93,11 @@ def load_requirements(requirements_files: Union[Path, List[Path]]) -> list:
         "Intended Audience :: Developers",
         "Intended Audience :: Information Technology",
         "Programming Language :: Python :: 3",
-        "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",
         "Programming Language :: Python :: Implementation :: CPython",
         "Development Status :: 5 - Production/Stable",
         "License :: OSI Approved :: MIT License",
diff --git a/sonar-project.properties b/sonar-project.properties
index dd18175..9b18975 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -6,7 +6,7 @@ sonar.projectKey=Guts_mkdocs-rss-plugin
 # only=main
 
 # Python versions
-sonar.python.version=3.8, 3.9, 3.10, 3.11, 3.12
+sonar.python.version=3.9, 3.10, 3.11, 3.12, 3.13
 
 # Path is relative to the sonar-project.properties file. Replace "\" by "/" on Windows.
 sonar.sources=mkdocs_rss_plugin
diff --git a/tests/test_build.py b/tests/test_build.py
index 78ac477..a312fbf 100644
--- a/tests/test_build.py
+++ b/tests/test_build.py
@@ -755,16 +755,20 @@ def test_json_feed_validation(self):
             self.assertIsNone(cli_result.exception)
 
             # created items
-            with Path(tmpdirname).joinpath(OUTPUT_JSON_FEED_CREATED).open(
-                "r", encoding="UTF-8"
-            ) as in_json:
+            with (
+                Path(tmpdirname)
+                .joinpath(OUTPUT_JSON_FEED_CREATED)
+                .open("r", encoding="UTF-8") as in_json
+            ):
                 json_feed_created_data = json.load(in_json)
             jsonfeed.Feed.parse(json_feed_created_data)
 
             # updated items
-            with Path(tmpdirname).joinpath(OUTPUT_JSON_FEED_UPDATED).open(
-                "r", encoding="UTF-8"
-            ) as in_json:
+            with (
+                Path(tmpdirname)
+                .joinpath(OUTPUT_JSON_FEED_UPDATED)
+                .open("r", encoding="UTF-8") as in_json
+            ):
                 json_feed_updated_data = json.load(in_json)
             jsonfeed.Feed.parse(json_feed_updated_data)