Import @override from typing_extensions conditionally

CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+* Import `@override` from `typing_extensions` conditionally.
+
 ## 2.6.3 - 2026-05-07
 
 * Add an "ocr" extra.

pyproject.toml

@@ -13,6 +13,7 @@ dependencies = [
   "djvulibre-python (>=0.9.3)",
   "fpdf2 (>=2.8)",
   "loguru (>=0.7)",
+  "typing_extensions (>=4.5.0); python_version < '3.12'",
   "pdfrw (>=0.4)",
   "pillow (>=12.2.0)",
 ]

src/dpsprep/options.py

@@ -1,10 +1,16 @@
 import json
+import sys
 from collections.abc import Iterator, Mapping
 from dataclasses import dataclass
 from typing import Any, Literal, cast, get_args
 
 import click
-from typing_extensions import override
+
+
+if sys.version_info < (3, 12):
+    from typing_extensions import override
+else:
+    from typing import override
 
 from dpsprep.exceptions import DpsPrepConfigError
 from dpsprep.ranges import (