diff --git a/.github/workflows/ci-cd.yml b/.github/workflows/ci-cd.yml
index c57b87bf8..58f2d6e28 100644
--- a/.github/workflows/ci-cd.yml
+++ b/.github/workflows/ci-cd.yml
@@ -453,17 +453,17 @@ jobs:
         # NOTE: The latest and the lowest supported Pythons are prioritized
         # NOTE: to improve the responsiveness. It's nice to see the most
         # NOTE: important results first.
-        - 3.13
-        - 3.9
+        - 3.14
         # str
         - >-
           3.10
+        - 3.13
         - 3.12
         - 3.11
         runner-vm-os:
         - ubuntu-24.04
-        - macos-14
-        - macos-13
+        - macos-15
+        - macos-15-intel
         - windows-2025
         toxenv:
         - pytest
diff --git a/.mypy.ini b/.mypy.ini
index a92387a64..b5c7808b9 100644
--- a/.mypy.ini
+++ b/.mypy.ini
@@ -1,5 +1,5 @@
 [mypy]
-python_version = 3.9
+python_version = 3.10
 color_output = true
 error_summary = true
 # IMPORTANT: The file list MUST NOT have a trailing comma after the last entry.
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 1b28af60c..c15a5d27e 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -121,53 +121,53 @@ repos:
   rev: 9f70dc58c23dfcca1b97af99eaeee3140a807c7e  # frozen: v1.18.2
   hooks:
   - id: mypy
-    alias: mypy-py313
-    name: MyPy, for Python 3.13
+    alias: mypy-py314
+    name: MyPy, for Python 3.14
     additional_dependencies:
     - lxml  # dep of `--txt-report`, `--cobertura-xml-report` & `--html-report`
     - pytest
     - pytest-mock
     args:
-    - --python-version=3.13
-    - --any-exprs-report=.tox/.tmp/.test-results/mypy--py-3.13
-    - --cobertura-xml-report=.tox/.tmp/.test-results/mypy--py-3.13
-    - --html-report=.tox/.tmp/.test-results/mypy--py-3.13
-    - --linecount-report=.tox/.tmp/.test-results/mypy--py-3.13
-    - --linecoverage-report=.tox/.tmp/.test-results/mypy--py-3.13
-    - --lineprecision-report=.tox/.tmp/.test-results/mypy--py-3.13
-    - --txt-report=.tox/.tmp/.test-results/mypy--py-3.13
+    - --python-version=3.14
+    - --any-exprs-report=.tox/.tmp/.test-results/mypy--py-3.14
+    - --cobertura-xml-report=.tox/.tmp/.test-results/mypy--py-3.14
+    - --html-report=.tox/.tmp/.test-results/mypy--py-3.14
+    - --linecount-report=.tox/.tmp/.test-results/mypy--py-3.14
+    - --linecoverage-report=.tox/.tmp/.test-results/mypy--py-3.14
+    - --lineprecision-report=.tox/.tmp/.test-results/mypy--py-3.14
+    - --txt-report=.tox/.tmp/.test-results/mypy--py-3.14
     pass_filenames: false
   - id: mypy
-    alias: mypy-py311
-    name: MyPy, for Python 3.11
+    alias: mypy-py312
+    name: MyPy, for Python 3.12
     additional_dependencies:
     - lxml  # dep of `--txt-report`, `--cobertura-xml-report` & `--html-report`
     - pytest
     - pytest-mock
     args:
-    - --python-version=3.11
-    - --any-exprs-report=.tox/.tmp/.test-results/mypy--py-3.11
-    - --cobertura-xml-report=.tox/.tmp/.test-results/mypy--py-3.11
-    - --html-report=.tox/.tmp/.test-results/mypy--py-3.11
-    - --linecount-report=.tox/.tmp/.test-results/mypy--py-3.11
-    - --linecoverage-report=.tox/.tmp/.test-results/mypy--py-3.11
-    - --lineprecision-report=.tox/.tmp/.test-results/mypy--py-3.11
-    - --txt-report=.tox/.tmp/.test-results/mypy--py-3.11
+    - --python-version=3.12
+    - --any-exprs-report=.tox/.tmp/.test-results/mypy--py-3.12
+    - --cobertura-xml-report=.tox/.tmp/.test-results/mypy--py-3.12
+    - --html-report=.tox/.tmp/.test-results/mypy--py-3.12
+    - --linecount-report=.tox/.tmp/.test-results/mypy--py-3.12
+    - --linecoverage-report=.tox/.tmp/.test-results/mypy--py-3.12
+    - --lineprecision-report=.tox/.tmp/.test-results/mypy--py-3.12
+    - --txt-report=.tox/.tmp/.test-results/mypy--py-3.12
     pass_filenames: false
   - id: mypy
-    alias: mypy-py39
-    name: MyPy, for Python 3.9
+    alias: mypy-py310
+    name: MyPy, for Python 3.10
     additional_dependencies:
     - lxml  # dep of `--txt-report`, `--cobertura-xml-report` & `--html-report`
     - pytest
     - pytest-mock
     args:
-    - --python-version=3.9
-    - --any-exprs-report=.tox/.tmp/.test-results/mypy--py-3.9
-    - --cobertura-xml-report=.tox/.tmp/.test-results/mypy--py-3.9
-    - --html-report=.tox/.tmp/.test-results/mypy--py-3.9
-    - --linecount-report=.tox/.tmp/.test-results/mypy--py-3.9
-    - --linecoverage-report=.tox/.tmp/.test-results/mypy--py-3.9
-    - --lineprecision-report=.tox/.tmp/.test-results/mypy--py-3.9
-    - --txt-report=.tox/.tmp/.test-results/mypy--py-3.9
+    - --python-version=3.10
+    - --any-exprs-report=.tox/.tmp/.test-results/mypy--py-3.10
+    - --cobertura-xml-report=.tox/.tmp/.test-results/mypy--py-3.10
+    - --html-report=.tox/.tmp/.test-results/mypy--py-3.10
+    - --linecount-report=.tox/.tmp/.test-results/mypy--py-3.10
+    - --linecoverage-report=.tox/.tmp/.test-results/mypy--py-3.10
+    - --lineprecision-report=.tox/.tmp/.test-results/mypy--py-3.10
+    - --txt-report=.tox/.tmp/.test-results/mypy--py-3.10
     pass_filenames: false
diff --git a/pyproject.toml b/pyproject.toml
index afef00e9d..8bcc4f992 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,11 +29,11 @@ classifiers = [
   'License :: OSI Approved :: MIT License',
   'Programming Language :: Python :: 3',
   'Programming Language :: Python :: 3 :: Only',
-  '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 :: 3.14',
   'Programming Language :: Python :: Implementation :: CPython',
   'Programming Language :: Python :: Implementation :: PyPy',
 ]
@@ -43,7 +43,7 @@ dynamic = [
   'urls',
   'version',
 ]
-requires-python = ">= 3.9"
+requires-python = ">= 3.10"
 
 [[project.authors]]
 name = 'Anton Babenko'
diff --git a/ruff.toml b/ruff.toml
index 0e57620ea..10a18fb0f 100644
--- a/ruff.toml
+++ b/ruff.toml
@@ -1,6 +1,3 @@
-# Assume Python 3.9
-target-version = "py39"
-
 line-length = 79 # To decrease PR diff size
 
 namespace-packages = ["src/pre_commit_terraform/", "tests/pytest/"]
diff --git a/src/pre_commit_terraform/_types.py b/src/pre_commit_terraform/_types.py
index 69f71e690..9d062afbf 100644
--- a/src/pre_commit_terraform/_types.py
+++ b/src/pre_commit_terraform/_types.py
@@ -2,12 +2,12 @@
 
 from argparse import ArgumentParser, Namespace
 from collections.abc import Callable
-from typing import Protocol, Union
+from typing import Protocol
 
 from ._structs import ReturnCode
 
 
-ReturnCodeType = Union[ReturnCode, int]  # Union instead of pipe for Python 3.9
+ReturnCodeType = ReturnCode | int
 CLIAppEntryPointCallableType = Callable[[Namespace], ReturnCodeType]