diff --git a/poetry.lock b/poetry.lock
index ef29ae00..8d39d22b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1509,13 +1509,13 @@ files = [
 
 [[package]]
 name = "typing-extensions"
-version = "4.13.1"
+version = "4.13.2"
 description = "Backported and Experimental Type Hints for Python 3.8+"
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "typing_extensions-4.13.1-py3-none-any.whl", hash = "sha256:4b6cf02909eb5495cfbc3f6e8fd49217e6cc7944e145cdda8caa3734777f9e69"},
-    {file = "typing_extensions-4.13.1.tar.gz", hash = "sha256:98795af00fb9640edec5b8e31fc647597b4691f099ad75f469a2616be1a76dff"},
+    {file = "typing_extensions-4.13.2-py3-none-any.whl", hash = "sha256:a439e7c04b49fec3e5d3e2beaa21755cadbbdc391694e28ccdd36ca4a1408f8c"},
+    {file = "typing_extensions-4.13.2.tar.gz", hash = "sha256:e6c81219bd689f51865d9e372991c540bda33a0379d5573cddb9a3a23f7caaef"},
 ]
 
 [[package]]
@@ -1538,4 +1538,4 @@ zstd = ["zstandard (>=0.18.0)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "185016cfabf31a4bff914b2efc10be4a53f2d9507ea364f7ee8e0f0936c6302c"
+content-hash = "b79abfa57894303381b413b8b6a12154b7fcb6bc80948e667306b460ceb92d0a"
diff --git a/pyproject.toml b/pyproject.toml
index edb8125e..d12741a4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,7 @@ numpy = [
   { version = ">=2.1", python = "^3.13" },
 ]
 hightime = "^0.2.2"
+typing-extensions = ">=4.13.2"
 
 [tool.poetry.group.lint.dependencies]
 bandit = { version = ">=1.7", extras = ["toml"] }
diff --git a/src/nitypes/_typing.py b/src/nitypes/_typing.py
deleted file mode 100644
index db8a8759..00000000
--- a/src/nitypes/_typing.py
+++ /dev/null
@@ -1,41 +0,0 @@
-"""Single source for typing backports to avoid depending on typing_extensions at run time."""
-
-from __future__ import annotations
-
-import sys
-from typing import TYPE_CHECKING
-
-if sys.version_info >= (3, 10):
-    from typing import TypeAlias
-elif TYPE_CHECKING:
-    from typing_extensions import TypeAlias
-else:
-    TypeAlias = None
-
-if sys.version_info >= (3, 11):
-    from typing import Self, assert_type
-elif TYPE_CHECKING:
-    from typing_extensions import Self, assert_type
-else:
-    Self = None
-
-    def assert_type(val, typ, /):  # noqa: D103 - Missing docstring in public function
-        pass
-
-
-if sys.version_info >= (3, 12):
-    from typing import override
-elif TYPE_CHECKING:
-    from typing_extensions import override
-else:
-
-    def override(arg, /):  # noqa: D103 - Missing docstring in public function
-        return arg
-
-
-__all__ = [
-    "assert_type",
-    "override",
-    "Self",
-    "TypeAlias",
-]
diff --git a/src/nitypes/time/_conversion.py b/src/nitypes/time/_conversion.py
index a850c5c9..dd68d2e9 100644
--- a/src/nitypes/time/_conversion.py
+++ b/src/nitypes/time/_conversion.py
@@ -6,9 +6,9 @@
 from typing import Any, TypeVar, Union, cast
 
 import hightime as ht
+from typing_extensions import TypeAlias
 
 from nitypes._exceptions import invalid_arg_type, invalid_requested_type
-from nitypes._typing import TypeAlias
 
 _AnyDateTime: TypeAlias = Union[dt.datetime, ht.datetime]
 _TDateTime = TypeVar("_TDateTime", dt.datetime, ht.datetime)
diff --git a/src/nitypes/waveform/_analog_waveform.py b/src/nitypes/waveform/_analog_waveform.py
index b8f825b4..aa0dc5f1 100644
--- a/src/nitypes/waveform/_analog_waveform.py
+++ b/src/nitypes/waveform/_analog_waveform.py
@@ -9,10 +9,10 @@
 import hightime as ht
 import numpy as np
 import numpy.typing as npt
+from typing_extensions import Self, TypeAlias
 
 from nitypes._arguments import arg_to_uint, validate_dtype, validate_unsupported_arg
 from nitypes._exceptions import invalid_arg_type, invalid_array_ndim
-from nitypes._typing import Self, TypeAlias
 from nitypes.waveform._exceptions import (
     input_array_data_type_mismatch,
     input_waveform_data_type_mismatch,
diff --git a/src/nitypes/waveform/_extended_properties.py b/src/nitypes/waveform/_extended_properties.py
index f5247aa6..162013e7 100644
--- a/src/nitypes/waveform/_extended_properties.py
+++ b/src/nitypes/waveform/_extended_properties.py
@@ -4,7 +4,7 @@
 from collections.abc import Mapping
 from typing import Iterator, MutableMapping, Union
 
-from nitypes._typing import TypeAlias
+from typing_extensions import TypeAlias
 
 # Extended property keys
 CHANNEL_NAME = "NI_ChannelName"
diff --git a/src/nitypes/waveform/_timing/_base.py b/src/nitypes/waveform/_timing/_base.py
index cea359dc..f5a590be 100644
--- a/src/nitypes/waveform/_timing/_base.py
+++ b/src/nitypes/waveform/_timing/_base.py
@@ -6,8 +6,9 @@
 from collections.abc import Iterable, Sequence
 from typing import Any, Generic, SupportsIndex, TypeVar
 
+from typing_extensions import Self
+
 from nitypes._exceptions import add_note
-from nitypes._typing import Self
 from nitypes.waveform._timing._sample_interval import (
     SampleIntervalMode,
     SampleIntervalStrategy,
diff --git a/src/nitypes/waveform/_timing/_conversion.py b/src/nitypes/waveform/_timing/_conversion.py
index 8debd2e7..f934dbe3 100644
--- a/src/nitypes/waveform/_timing/_conversion.py
+++ b/src/nitypes/waveform/_timing/_conversion.py
@@ -6,15 +6,14 @@
 from typing import Any, TypeVar, Union, cast
 
 import hightime as ht
+from typing_extensions import TypeAlias
 
 from nitypes._exceptions import invalid_arg_type, invalid_requested_type
-from nitypes._typing import TypeAlias
 from nitypes.time._conversion import convert_datetime, convert_timedelta
 from nitypes.waveform._timing._base import BaseTiming
 from nitypes.waveform._timing._precision import PrecisionTiming
 from nitypes.waveform._timing._standard import Timing
 
-
 _AnyTiming: TypeAlias = Union[BaseTiming[Any, Any], Timing, PrecisionTiming]
 _TTiming = TypeVar("_TTiming", bound=BaseTiming[Any, Any])
 
diff --git a/src/nitypes/waveform/_timing/_precision.py b/src/nitypes/waveform/_timing/_precision.py
index c77effcd..c3e8a256 100644
--- a/src/nitypes/waveform/_timing/_precision.py
+++ b/src/nitypes/waveform/_timing/_precision.py
@@ -4,8 +4,8 @@
 from typing import ClassVar
 
 import hightime as ht
+from typing_extensions import override
 
-from nitypes._typing import override
 from nitypes.waveform._timing._base import BaseTiming
 from nitypes.waveform._timing._sample_interval import SampleIntervalMode
 
diff --git a/src/nitypes/waveform/_timing/_standard.py b/src/nitypes/waveform/_timing/_standard.py
index c9d1e88a..51bbee99 100644
--- a/src/nitypes/waveform/_timing/_standard.py
+++ b/src/nitypes/waveform/_timing/_standard.py
@@ -4,7 +4,8 @@
 from collections.abc import Sequence
 from typing import ClassVar
 
-from nitypes._typing import override
+from typing_extensions import override
+
 from nitypes.waveform._timing._base import BaseTiming
 from nitypes.waveform._timing._sample_interval import SampleIntervalMode
 
diff --git a/tests/unit/time/test_conversion.py b/tests/unit/time/test_conversion.py
index b8e91234..809fcb05 100644
--- a/tests/unit/time/test_conversion.py
+++ b/tests/unit/time/test_conversion.py
@@ -5,8 +5,8 @@
 
 import hightime as ht
 import pytest
+from typing_extensions import assert_type
 
-from nitypes._typing import assert_type
 from nitypes.time import convert_datetime, convert_timedelta
 
 
diff --git a/tests/unit/waveform/_scaling/test_linear.py b/tests/unit/waveform/_scaling/test_linear.py
index 29068e78..06a1dd71 100644
--- a/tests/unit/waveform/_scaling/test_linear.py
+++ b/tests/unit/waveform/_scaling/test_linear.py
@@ -7,8 +7,8 @@
 import numpy as np
 import numpy.typing as npt
 import pytest
+from typing_extensions import assert_type
 
-from nitypes._typing import assert_type
 from nitypes.waveform import NO_SCALING, LinearScaleMode, ScaleMode
 
 
diff --git a/tests/unit/waveform/_scaling/test_none.py b/tests/unit/waveform/_scaling/test_none.py
index 69e6206a..62e71c21 100644
--- a/tests/unit/waveform/_scaling/test_none.py
+++ b/tests/unit/waveform/_scaling/test_none.py
@@ -5,8 +5,8 @@
 
 import numpy as np
 import numpy.typing as npt
+from typing_extensions import assert_type
 
-from nitypes._typing import assert_type
 from nitypes.waveform import NO_SCALING, NoneScaleMode
 
 
diff --git a/tests/unit/waveform/_timing/test_conversion.py b/tests/unit/waveform/_timing/test_conversion.py
index f6754c9b..0eb18268 100644
--- a/tests/unit/waveform/_timing/test_conversion.py
+++ b/tests/unit/waveform/_timing/test_conversion.py
@@ -3,8 +3,8 @@
 import datetime as dt
 
 import hightime as ht
+from typing_extensions import assert_type
 
-from nitypes._typing import assert_type
 from nitypes.waveform import PrecisionTiming, SampleIntervalMode, Timing
 from nitypes.waveform._timing import convert_timing
 
diff --git a/tests/unit/waveform/_timing/test_precision.py b/tests/unit/waveform/_timing/test_precision.py
index 27ac5364..252a25b5 100644
--- a/tests/unit/waveform/_timing/test_precision.py
+++ b/tests/unit/waveform/_timing/test_precision.py
@@ -6,8 +6,8 @@
 
 import hightime as ht
 import pytest
+from typing_extensions import assert_type
 
-from nitypes._typing import assert_type
 from nitypes.waveform import PrecisionTiming, SampleIntervalMode
 from tests.unit.waveform._timing._utils import assert_deep_copy, assert_shallow_copy
 
diff --git a/tests/unit/waveform/_timing/test_standard.py b/tests/unit/waveform/_timing/test_standard.py
index b4366d2b..676564aa 100644
--- a/tests/unit/waveform/_timing/test_standard.py
+++ b/tests/unit/waveform/_timing/test_standard.py
@@ -5,8 +5,8 @@
 import pickle
 
 import pytest
+from typing_extensions import assert_type
 
-from nitypes._typing import assert_type
 from nitypes.waveform import SampleIntervalMode, Timing
 from tests.unit.waveform._timing._utils import assert_deep_copy, assert_shallow_copy
 
diff --git a/tests/unit/waveform/test_analog_waveform.py b/tests/unit/waveform/test_analog_waveform.py
index 0a1a67ad..988698a7 100644
--- a/tests/unit/waveform/test_analog_waveform.py
+++ b/tests/unit/waveform/test_analog_waveform.py
@@ -12,8 +12,8 @@
 import numpy as np
 import numpy.typing as npt
 import pytest
+from typing_extensions import assert_type
 
-from nitypes._typing import assert_type
 from nitypes.waveform import (
     NO_SCALING,
     AnalogWaveform,