diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index d9118c7..f629d82 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        python-version: [ '3.10' ]
+        python-version: [ '3.12' ]
 
     steps:
     - uses: actions/checkout@v7
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index 05bf670..c7506d9 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -14,10 +14,10 @@ jobs:
     steps:
     - uses: actions/checkout@v7
 
-    - name: Set up Python 3.10
+    - name: Set up Python 3.12
       uses: actions/setup-python@v7
       with:
-        python-version: '3.10'
+        python-version: '3.12'
 
     - name: Set up uv
       uses: astral-sh/setup-uv@v9.0.0
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 9aca02e..2bdd4f9 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -32,7 +32,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v7
       with:
-        python-version: '3.10'
+        python-version: '3.12'
 
     - name: Set up uv
       uses: astral-sh/setup-uv@v9.0.0
@@ -83,7 +83,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v7
       with:
-        python-version: '3.10'
+        python-version: '3.12'
 
     - name: Set up uv
       uses: astral-sh/setup-uv@v9.0.0
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2170f98..efbb399 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest, macos-latest ]
-        python-version: [ '3.9', '3.10', '3.11', '3.12', '3.13' ]
+        python-version: [ '3.11', '3.12', '3.13' ]
 
     steps:
     - uses: actions/checkout@v7
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 4b10603..034e578 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -9,7 +9,7 @@
 #
 #
 default_language_version:
-  python: python3.10
+  python: python3.12
 
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
@@ -22,5 +22,3 @@ repos:
     rev: v2.3.0
     hooks:
       - id: codespell
-        additional_dependencies:
-          - tomli
diff --git a/docs/conf.py b/docs/conf.py
index 127c346..d942741 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,13 +1,13 @@
 from datetime import date
 import os
 import shutil
-
-import toml
+import tomllib
 
 import audeer
 
 
-config = toml.load(audeer.path("..", "pyproject.toml"))
+with open(audeer.path("..", "pyproject.toml"), "rb") as fp:
+    config = tomllib.load(fp)
 
 
 # Project -----------------------------------------------------------------
diff --git a/docs/usage.rst b/docs/usage.rst
index 089fdbc..87db3de 100644
--- a/docs/usage.rst
+++ b/docs/usage.rst
@@ -145,7 +145,7 @@ We can create a custom config.
 
 .. jupyter-execute::
 
-    config_str = """
+    config_str = r"""
     [componentInstances:cComponentManager]
     instance[dataMemory].type=cDataMemory
 
diff --git a/pyproject.toml b/pyproject.toml
index f25caa7..663fe73 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,14 +25,12 @@ classifiers = [
     'Operating System :: OS Independent',
     'Programming Language :: Python',
     'Programming Language :: Python :: 3',
-    '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',
     'Topic :: Scientific/Engineering',
 ]
-requires-python = '>=3.9'
+requires-python = '>=3.11'
 dependencies = [
     'audobject >=0.6.1',
     'audinterface >=0.7.0',
@@ -61,7 +59,6 @@ dev = [
     'sphinx-audeering-theme >=1.2.1',
     'sphinx-autodoc-typehints',
     'sphinx-copybutton',
-    'toml',
 ]