diff --git a/pyproject.toml b/pyproject.toml
index 3dbf2bd..1748fa1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "runtime-keypath"
-version = "0.1.6"
+version = "0.1.7"
 authors = [{ name = "Chris Fu", email = "17433201@qq.com" }]
 description = "Supports runtime key-path recording/accessing for Python."
 classifiers = [
diff --git a/runtime_keypath/_core.py b/runtime_keypath/_core.py
index a0770c4..d5d0ac0 100644
--- a/runtime_keypath/_core.py
+++ b/runtime_keypath/_core.py
@@ -8,8 +8,7 @@
 
 import threading
 from collections.abc import Sequence
-
-from typing_extensions import (
+from typing import (
     TYPE_CHECKING,
     Any,
     Final,
@@ -17,11 +16,18 @@
     Protocol,
     TypeVar,
     cast,
-    deprecated,
     final,
-    override,
 )
 
+try:
+    from typing_extensions import deprecated, override
+except ImportError:
+    if TYPE_CHECKING:
+        assert False
+    else:
+        deprecated = lambda *args, **kwargs: lambda x: x
+        override = lambda x: x
+
 _T = TypeVar("_T")
 
 _Value_co = TypeVar("_Value_co", covariant=True)