diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d2fc6c3..75971dc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,7 +39,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
 
     env:
       UV_PYTHON: ${{ matrix.python-version }}
diff --git a/pydantic_extra_types/color.py b/pydantic_extra_types/color.py
index 5f1e3a5..92995e5 100644
--- a/pydantic_extra_types/color.py
+++ b/pydantic_extra_types/color.py
@@ -12,16 +12,16 @@
 import math
 import re
 from colorsys import hls_to_rgb, rgb_to_hls
-from typing import Any, Callable, Literal, Union, cast
+from typing import Any, Callable, Literal, Tuple, Union, cast
 
 from pydantic import GetJsonSchemaHandler
 from pydantic._internal import _repr
 from pydantic.json_schema import JsonSchemaValue
 from pydantic_core import CoreSchema, PydanticCustomError, core_schema
 
-ColorTuple = Union[tuple[int, int, int], tuple[int, int, int, float]]
+ColorTuple = Union[Tuple[int, int, int], Tuple[int, int, int, float]]
 ColorType = Union[ColorTuple, str, 'Color']
-HslColorTuple = Union[tuple[float, float, float], tuple[float, float, float, float]]
+HslColorTuple = Union[Tuple[float, float, float], Tuple[float, float, float, float]]
 
 
 class RGBA:
@@ -115,7 +115,7 @@ def as_named(self, *, fallback: bool = False) -> str:
         """
         if self._rgba.alpha is not None:
             return self.as_hex()
-        rgb = cast(tuple[int, int, int], self.as_rgb_tuple())
+        rgb = cast('tuple[int, int, int]', self.as_rgb_tuple())
 
         if rgb in COLORS_BY_VALUE:
             return COLORS_BY_VALUE[rgb]
diff --git a/pydantic_extra_types/coordinate.py b/pydantic_extra_types/coordinate.py
index 04717b9..cfd14fe 100644
--- a/pydantic_extra_types/coordinate.py
+++ b/pydantic_extra_types/coordinate.py
@@ -3,8 +3,10 @@
 [`Coordinate`][pydantic_extra_types.coordinate.Coordinate] data types.
 """
 
+from __future__ import annotations
+
 from dataclasses import dataclass
-from typing import Any, ClassVar
+from typing import Any, ClassVar, Tuple
 
 from pydantic import GetCoreSchemaHandler
 from pydantic._internal import _repr
@@ -89,7 +91,7 @@ class Location(BaseModel):
     ```
     """
 
-    _NULL_ISLAND: ClassVar[tuple[float, float]] = (0.0, 0.0)
+    _NULL_ISLAND: ClassVar[Tuple[float, float]] = (0.0, 0.0)
 
     latitude: Latitude
     longitude: Longitude
@@ -100,7 +102,7 @@ def __get_pydantic_core_schema__(cls, source: type[Any], handler: GetCoreSchemaH
             core_schema.no_info_wrap_validator_function(cls._parse_str, core_schema.str_schema()),
             core_schema.no_info_wrap_validator_function(
                 cls._parse_tuple,
-                handler.generate_schema(tuple[float, float]),
+                handler.generate_schema(Tuple[float, float]),
             ),
             handler(source),
         ]
diff --git a/pydantic_extra_types/domain.py b/pydantic_extra_types/domain.py
index 9dfef55..1e44ebb 100644
--- a/pydantic_extra_types/domain.py
+++ b/pydantic_extra_types/domain.py
@@ -5,7 +5,6 @@
 from __future__ import annotations
 
 import re
-from collections.abc import Mapping
 from typing import Any
 
 from pydantic import GetCoreSchemaHandler
@@ -54,5 +53,5 @@ def __get_pydantic_core_schema__(cls, source_type: Any, handler: GetCoreSchemaHa
     @classmethod
     def __get_pydantic_json_schema__(
         cls, schema: core_schema.CoreSchema, handler: GetCoreSchemaHandler
-    ) -> Mapping[str, Any]:
+    ) -> dict[str, Any]:
         return handler(schema)
diff --git a/pydantic_extra_types/pendulum_dt.py b/pydantic_extra_types/pendulum_dt.py
index 9b7b00b..797bb8e 100644
--- a/pydantic_extra_types/pendulum_dt.py
+++ b/pydantic_extra_types/pendulum_dt.py
@@ -2,6 +2,8 @@
 CoreSchema implementation. This allows Pydantic to validate the DateTime object.
 """
 
+from __future__ import annotations
+
 try:
     from pendulum import Date as _Date
     from pendulum import DateTime as _DateTime
@@ -63,7 +65,7 @@ def __get_pydantic_core_schema__(cls, source: type[Any], handler: GetCoreSchemaH
         return core_schema.no_info_wrap_validator_function(cls._validate, core_schema.datetime_schema())
 
     @classmethod
-    def _validate(cls, value: Any, handler: core_schema.ValidatorFunctionWrapHandler) -> 'DateTime':
+    def _validate(cls, value: Any, handler: core_schema.ValidatorFunctionWrapHandler) -> DateTime:
         """Validate the datetime object and return it.
 
         Args:
@@ -128,7 +130,7 @@ def __get_pydantic_core_schema__(cls, source: type[Any], handler: GetCoreSchemaH
         return core_schema.no_info_wrap_validator_function(cls._validate, core_schema.date_schema())
 
     @classmethod
-    def _validate(cls, value: Any, handler: core_schema.ValidatorFunctionWrapHandler) -> 'Date':
+    def _validate(cls, value: Any, handler: core_schema.ValidatorFunctionWrapHandler) -> Date:
         """Validate the date object and return it.
 
         Args:
@@ -187,7 +189,7 @@ def __get_pydantic_core_schema__(cls, source: type[Any], handler: GetCoreSchemaH
         return core_schema.no_info_wrap_validator_function(cls._validate, core_schema.timedelta_schema())
 
     @classmethod
-    def _validate(cls, value: Any, handler: core_schema.ValidatorFunctionWrapHandler) -> 'Duration':
+    def _validate(cls, value: Any, handler: core_schema.ValidatorFunctionWrapHandler) -> Duration:
         """Validate the Duration object and return it.
 
         Args:
diff --git a/pydantic_extra_types/phone_numbers.py b/pydantic_extra_types/phone_numbers.py
index e405d8c..ca1ccb9 100644
--- a/pydantic_extra_types/phone_numbers.py
+++ b/pydantic_extra_types/phone_numbers.py
@@ -9,7 +9,7 @@
 from collections.abc import Sequence
 from dataclasses import dataclass
 from functools import partial
-from typing import Any, ClassVar, Optional
+from typing import Any, ClassVar
 
 from pydantic import GetCoreSchemaHandler, GetJsonSchemaHandler
 from pydantic_core import PydanticCustomError, core_schema
@@ -107,9 +107,9 @@ class SomeModel(BaseModel):
             us_number: USNumberType
     """
 
-    default_region: Optional[str] = None
+    default_region: str | None = None
     number_format: str = 'RFC3966'
-    supported_regions: Optional[Sequence[str]] = None
+    supported_regions: Sequence[str] | None = None
 
     def __post_init__(self) -> None:
         if self.default_region and self.default_region not in phonenumbers.SUPPORTED_REGIONS:
@@ -131,7 +131,7 @@ def __post_init__(self) -> None:
     def _parse(
         region: str | None,
         number_format: str,
-        supported_regions: Optional[Sequence[str]],
+        supported_regions: Sequence[str] | None,
         phone_number: Any,
     ) -> str:
         if not phone_number:
diff --git a/pydantic_extra_types/routing_number.py b/pydantic_extra_types/routing_number.py
index 912e3e8..fa9438d 100644
--- a/pydantic_extra_types/routing_number.py
+++ b/pydantic_extra_types/routing_number.py
@@ -2,6 +2,8 @@
 [`ABARoutingNumber`][pydantic_extra_types.routing_number.ABARoutingNumber] data type.
 """
 
+from __future__ import annotations
+
 from typing import Any, ClassVar
 
 from pydantic import GetCoreSchemaHandler
@@ -54,7 +56,7 @@ def __get_pydantic_core_schema__(
         )
 
     @classmethod
-    def _validate(cls, __input_value: str, _: core_schema.ValidationInfo) -> 'ABARoutingNumber':
+    def _validate(cls, __input_value: str, _: core_schema.ValidationInfo) -> ABARoutingNumber:
         return cls(__input_value)
 
     @classmethod
diff --git a/pydantic_extra_types/semver.py b/pydantic_extra_types/semver.py
index 2b58864..f53b80f 100644
--- a/pydantic_extra_types/semver.py
+++ b/pydantic_extra_types/semver.py
@@ -4,12 +4,13 @@
 """
 
 import warnings
-from typing import Annotated, Any, Callable
+from typing import Any, Callable
 
 from pydantic import GetJsonSchemaHandler
 from pydantic.json_schema import JsonSchemaValue
 from pydantic_core import core_schema
 from semver import Version
+from typing_extensions import Annotated
 
 warnings.warn(
     'Use from pydantic_extra_types.semver import SemanticVersion instead. Will be removed in 3.0.0.', DeprecationWarning
diff --git a/pydantic_extra_types/timezone_name.py b/pydantic_extra_types/timezone_name.py
index b33b6e6..773a612 100644
--- a/pydantic_extra_types/timezone_name.py
+++ b/pydantic_extra_types/timezone_name.py
@@ -57,7 +57,7 @@ def get_timezones() -> set[str]:
 class TimeZoneNameSettings(type):
     def __new__(cls, name: str, bases: tuple[type, ...], dct: dict[str, Any], **kwargs: Any) -> type[TimeZoneName]:
         dct['strict'] = kwargs.pop('strict', True)
-        return cast(type[TimeZoneName], super().__new__(cls, name, bases, dct))
+        return cast('type[TimeZoneName]', super().__new__(cls, name, bases, dct))
 
     def __init__(cls, name: str, bases: tuple[type, ...], dct: dict[str, Any], **kwargs: Any) -> None:
         super().__init__(name, bases, dct)
diff --git a/pyproject.toml b/pyproject.toml
index 8192da1..3b55e38 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -92,7 +92,7 @@ keep-runtime-typing = true
 
 [tool.ruff]
 line-length = 120
-target-version = "py39"
+target-version = 'py38'
 
 [tool.ruff.lint]
 extend-select = [
diff --git a/tests/test_json_schema.py b/tests/test_json_schema.py
index 96773bc..abe419e 100644
--- a/tests/test_json_schema.py
+++ b/tests/test_json_schema.py
@@ -3,12 +3,7 @@
 import pycountry
 import pytest
 from pydantic import BaseModel
-
-try:
-    from typing import Annotated
-except ImportError:
-    # Python 3.8
-    from typing import Annotated
+from typing_extensions import Annotated
 
 import pydantic_extra_types
 from pydantic_extra_types import epoch
diff --git a/tests/test_phone_numbers_validator.py b/tests/test_phone_numbers_validator.py
index e882da8..81f682c 100644
--- a/tests/test_phone_numbers_validator.py
+++ b/tests/test_phone_numbers_validator.py
@@ -1,16 +1,10 @@
 from typing import Any, Optional, Union
 
-try:
-    from typing import Annotated
-except ImportError:
-    # Python 3.8
-    from typing import Annotated
-
-
 import phonenumbers
 import pytest
 from phonenumbers import PhoneNumber
 from pydantic import BaseModel, TypeAdapter, ValidationError
+from typing_extensions import Annotated
 
 from pydantic_extra_types.phone_numbers import PhoneNumberValidator
 
diff --git a/uv.lock b/uv.lock
index d8ad2db..765a14c 100644
--- a/uv.lock
+++ b/uv.lock
@@ -477,7 +477,7 @@ wheels = [
 
 [[package]]
 name = "pydantic-extra-types"
-version = "2.10.0"
+version = "2.10.1"
 source = { editable = "." }
 dependencies = [
     { name = "pydantic" },