diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ce00c9d..f31588e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,79 +1,74 @@
 # badge: https://github.com/xstatic-py/xstatic/workflows/CI/badge.svg?branch=master
-
+---
 name: CI
-
 on:
   push:
-    branches: [ master ]
+    branches: ["master"]
     paths:
-    - '**.py'
-    - '**.yml'
-    - '**.toml'
-    - '!docs/**'
+      - '**.py'
+      - '**.yml'
+      - '**.toml'
+      - '!docs/**'
   pull_request:
-    branches: [ master ]
+    branches: ["master"]
     paths:
-    - '**.py'
-    - '**.yml'
-    - '**.toml'
-    - '!docs/**'
+      - '**.py'
+      - '**.yml'
+      - '**.toml'
+      - '!docs/**'
 
 jobs:
   lint:
-
     runs-on: ubuntu-24.04
     timeout-minutes: 5
-
     steps:
-    - uses: actions/checkout@v4
-    - uses: chartboost/ruff-action@v1
+      - uses: actions/checkout@v7
+      - uses: astral-sh/ruff-action@v4.1.0
 
   CI:
-
     needs: lint
     strategy:
       fail-fast: false
       matrix:
         include:
-            - os: macos-latest
-              python-version: '3.9'
-            - os: ubuntu-24.04
-              python-version: '3.10'
-            - os: ubuntu-24.04
-              python-version: '3.11'
-            - os: ubuntu-24.04
-              python-version: '3.12'
-            - os: ubuntu-24.04
-              python-version: '3.13'
-
+          - os: macos-latest
+            python-version: '3.11'
+          - os: macos-latest
+            python-version: '3.14'
+          - os: ubuntu-24.04
+            python-version: '3.11'
+          - os: ubuntu-24.04
+            python-version: '3.12'
+          - os: ubuntu-24.04
+            python-version: '3.13'
+          - os: ubuntu-26.04
+            python-version: '3.14'
     env:
       TOXENV: ${{ matrix.toxenv }}
-
     runs-on: ${{ matrix.os }}
     timeout-minutes: 10
-
     steps:
-    - uses: actions/checkout@v4
-      with:
-        fetch-depth: 0
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install Python requirements
-      run: |
-        python -m pip install --upgrade pip setuptools wheel build
-    - name: try building a package
-      run: python -m build
-    - name: Install and import xstatic packages (modernize branch)
-      run: |
-        python -m venv venv
-        . venv/bin/activate
-        pip install .
-        pip install git+https://github.com/xstatic-py/xstatic-bootstrap.git@modernize
-        pip install git+https://github.com/xstatic-py/xstatic-font-awesome.git@modernize
-        python -c "import xstatic; print('Importing...')"
-        python -c "from xstatic.pkg import bootstrap as xs; assert xs.NAME == 'bootstrap'"
-        python -c "from xstatic.pkg import font_awesome as xs; assert xs.NAME == 'font_awesome'"
-        deactivate
-        rm -rf venv
+      - uses: actions/checkout@v7
+        with:
+          fetch-depth: 0
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v7
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install Python requirements
+        run: |
+          python -m pip install --upgrade pip setuptools wheel build
+      - name: try building a package
+        run: python -m build
+      - name: Install and import xstatic packages (modernize branch)
+        run: |
+          python -m venv venv
+          . venv/bin/activate
+          pip install .
+          pip install git+https://github.com/xstatic-py/xstatic-bootstrap.git@modernize
+          pip install git+https://github.com/xstatic-py/xstatic-font-awesome.git@modernize
+          python -c "import xstatic; print('Importing...')"
+          python -c "from xstatic.pkg import bootstrap as xs; assert xs.NAME == 'bootstrap'"
+          python -c "from xstatic.pkg import font_awesome as xs; assert xs.NAME == 'font_awesome'"
+          deactivate
+          rm -rf venv
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 034d869..cc18ca2 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -20,199 +20,195 @@
 # -- General configuration -----------------------------------------------------
 
 # If your documentation needs a minimal Sphinx version, state it here.
-#needs_sphinx = '1.0'
+# needs_sphinx = '1.0'
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['sphinx.ext.todo', 'sphinx.ext.coverage', 'sphinx.ext.viewcode']
+extensions = ["sphinx.ext.todo", "sphinx.ext.coverage", "sphinx.ext.viewcode"]
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["_templates"]
 
 # The suffix of source filenames.
-source_suffix = '.rst'
+source_suffix = ".rst"
 
 # The encoding of source files.
-#source_encoding = 'utf-8-sig'
+# source_encoding = 'utf-8-sig'
 
 # The master toctree document.
-master_doc = 'index'
+master_doc = "index"
 
 # General information about the project.
-project = 'XStatic'
-copyright = '2011-2025, Thomas Waldmann'
+project = "XStatic"
+copyright = "2011-2026, Thomas Waldmann"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = '2.0'
+version = "2.0"
 # The full version, including alpha/beta/rc tags.
-release = '2.0.0'
+release = "2.0.0"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
-#language = None
+# language = None
 
 # There are two options for replacing |today|: either, you set today to some
 # non-false value, then it is used:
-#today = ''
+# today = ''
 # Else, today_fmt is used as the format for a strftime call.
-#today_fmt = '%B %d, %Y'
+# today_fmt = '%B %d, %Y'
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 exclude_patterns = []
 
 # The reST default role (used for this markup: `text`) to use for all documents.
-#default_role = None
+# default_role = None
 
 # If true, '()' will be appended to :func: etc. cross-reference text.
-#add_function_parentheses = True
+# add_function_parentheses = True
 
 # If true, the current module name will be prepended to all description
 # unit titles (such as .. function::).
-#add_module_names = True
+# add_module_names = True
 
 # If true, sectionauthor and moduleauthor directives will be shown in the
 # output. They are ignored by default.
-#show_authors = False
+# show_authors = False
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = "sphinx"
 
 # A list of ignored prefixes for module index sorting.
-#modindex_common_prefix = []
+# modindex_common_prefix = []
 
 
 # -- Options for HTML output ---------------------------------------------------
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+html_theme = "default"
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
-#html_theme_options = {}
+# html_theme_options = {}
 
 # Add any paths that contain custom themes here, relative to this directory.
-#html_theme_path = []
+# html_theme_path = []
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
-#html_title = None
+# html_title = None
 
 # A shorter title for the navigation bar.  Default is the same as html_title.
-#html_short_title = None
+# html_short_title = None
 
 # The name of an image file (relative to this directory) to place at the top
 # of the sidebar.
-#html_logo = None
+# html_logo = None
 
 # The name of an image file (within the static path) to use as favicon of the
 # docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
 # pixels large.
-#html_favicon = None
+# html_favicon = None
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ["_static"]
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.
-#html_last_updated_fmt = '%b %d, %Y'
+# html_last_updated_fmt = '%b %d, %Y'
 
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
-#html_use_smartypants = True
+# html_use_smartypants = True
 
 # Custom sidebar templates, maps document names to template names.
-#html_sidebars = {}
+# html_sidebars = {}
 
 # Additional templates that should be rendered to pages, maps page names to
 # template names.
-#html_additional_pages = {}
+# html_additional_pages = {}
 
 # If false, no module index is generated.
-#html_domain_indices = True
+# html_domain_indices = True
 
 # If false, no index is generated.
-#html_use_index = True
+# html_use_index = True
 
 # If true, the index is split into individual pages for each letter.
-#html_split_index = False
+# html_split_index = False
 
 # If true, links to the reST sources are added to the pages.
-#html_show_sourcelink = True
+# html_show_sourcelink = True
 
 # If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
-#html_show_sphinx = True
+# html_show_sphinx = True
 
 # If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
-#html_show_copyright = True
+# html_show_copyright = True
 
 # If true, an OpenSearch description file will be output, and all pages will
 # contain a <link> tag referring to it.  The value of this option must be the
 # base URL from which the finished HTML is served.
-#html_use_opensearch = ''
+# html_use_opensearch = ''
 
 # This is the file name suffix for HTML files (e.g. ".xhtml").
-#html_file_suffix = None
+# html_file_suffix = None
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = 'XStaticdoc'
+htmlhelp_basename = "XStaticdoc"
 
 
 # -- Options for LaTeX output --------------------------------------------------
 
 # The paper size ('letter' or 'a4').
-#latex_paper_size = 'letter'
+# latex_paper_size = 'letter'
 
 # The font size ('10pt', '11pt' or '12pt').
-#latex_font_size = '10pt'
+# latex_font_size = '10pt'
 
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual]).
 latex_documents = [
-  ('index', 'XStatic.tex', 'XStatic Documentation',
-   'Thomas Waldmann', 'manual'),
+    ("index", "XStatic.tex", "XStatic Documentation", "Thomas Waldmann", "manual"),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
 # the title page.
-#latex_logo = None
+# latex_logo = None
 
 # For "manual" documents, if this is true, then toplevel headings are parts,
 # not chapters.
-#latex_use_parts = False
+# latex_use_parts = False
 
 # If true, show page references after internal links.
-#latex_show_pagerefs = False
+# latex_show_pagerefs = False
 
 # If true, show URL addresses after external links.
-#latex_show_urls = False
+# latex_show_urls = False
 
 # Additional stuff for the LaTeX preamble.
-#latex_preamble = ''
+# latex_preamble = ''
 
 # Documents to append as an appendix to all manuals.
-#latex_appendices = []
+# latex_appendices = []
 
 # If false, no module index is generated.
-#latex_domain_indices = True
+# latex_domain_indices = True
 
 
 # -- Options for manual page output --------------------------------------------
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [
-    ('index', 'xstatic', 'XStatic Documentation',
-     ['Thomas Waldmann'], 1)
-]
+man_pages = [("index", "xstatic", "XStatic Documentation", ["Thomas Waldmann"], 1)]
 
 # -- Options for Texinfo output ------------------------------------------------
 
@@ -220,8 +216,15 @@
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-  ('index', 'XStatic', 'XStatic Documentation', 'Thomas Waldmann',
-   'XStatic', 'One line description of project.', 'Miscellaneous'),
+    (
+        "index",
+        "XStatic",
+        "XStatic Documentation",
+        "Thomas Waldmann",
+        "XStatic",
+        "One line description of project.",
+        "Miscellaneous",
+    ),
 ]
 
 # Documents to append as an appendix to all manuals.
diff --git a/pyproject.toml b/pyproject.toml
index de7740e..c0782ea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,10 @@
-# Copyright: 2011-2025 by the XStatic authors, see AUTHORS.rst for details.
+# Copyright: 2011-2026 by the XStatic authors, see AUTHORS.rst for details.
 # License: MIT license, see LICENSE.txt for details.
 
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
 [project]
 name = "XStatic"
 version = "2.0.0"
@@ -8,7 +12,7 @@ description = "XStatic base package with minimal support code"
 readme = {file="README.rst", content-type="text/x-rst"}
 authors = [{name="Thomas Waldmann", email="tw@waldmann-edv.de"}, ]
 maintainers = [{name="Thomas Waldmann", email="tw@waldmann-edv.de"}, ]
-requires-python = ">=3.9"
+requires-python = ">=3.11"
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
@@ -34,7 +38,3 @@ include-package-data = true
 
 [tool.setuptools.packages.find]
 where = ["src"]
-
-[build-system]
-requires = ["setuptools", "wheel", ]
-build-backend = "setuptools.build_meta"
diff --git a/src/xstatic/__init__.py b/src/xstatic/__init__.py
index 41bf875..ea8c20f 100644
--- a/src/xstatic/__init__.py
+++ b/src/xstatic/__init__.py
@@ -1,2 +1,2 @@
-# Copyright: 2011-2025 by the XStatic authors, see AUTHORS.rst for details.
+# Copyright: 2011-2026 by the XStatic authors, see AUTHORS.rst for details.
 # License: MIT license, see LICENSE.txt for details.
diff --git a/src/xstatic/main.py b/src/xstatic/main.py
index efc43b2..e0effed 100644
--- a/src/xstatic/main.py
+++ b/src/xstatic/main.py
@@ -1,16 +1,18 @@
-# Copyright: 2011-2025 by the XStatic authors, see AUTHORS.rst for details.
+# Copyright: 2011-2026 by the XStatic authors, see AUTHORS.rst for details.
 # License: MIT license, see LICENSE.txt for details.
 
 """
 XStatic - main package with minimal support code to work with static file packages
 """
 
+
 class XStatic:
     """
     minimal support code to access resources from xstatic.pkg.* files
     or CDN locations.
     """
-    def __init__(self, module, root_url='/xstatic', provider='local', protocol='http'):
+
+    def __init__(self, module, root_url="/xstatic", provider="local", protocol="http"):
         """
         :arg module: xstatic resource package/module, has metadata as attributes
         :arg root_url: the common root url path for all local xstatic
@@ -19,12 +21,15 @@ def __init__(self, module, root_url='/xstatic', provider='local', protocol='http
                        a name of another source (e.g. CDN)
         :arg protocol: 'http' (default) or 'https'
         """
-        self.__dict__.update([(name.lower(), getattr(module, name))
-                              for name in dir(module)
-                              if name.isupper()
-                             ])
+        self.__dict__.update(
+            [
+                (name.lower(), getattr(module, name))
+                for name in dir(module)
+                if name.isupper()
+            ]
+        )
         self.provider = provider
-        if provider == 'local':
+        if provider == "local":
             self.base_url = f"{root_url}/{self.name}"
         else:
             self.base_url = self.locations[(provider, protocol)]
@@ -34,7 +39,7 @@ def get_mapping(self):
         query the mapping url -> directory, use this to setup
         your own static file serving.
         """
-        if self.provider == 'local':
+        if self.provider == "local":
             return self.base_url, self.base_dir
 
     def url_for(self, path):
@@ -49,4 +54,3 @@ def url_for(self, path):
         elif isinstance(loc, dict):
             loc = loc[path]
         return loc
-