diff --git a/pathspec/gitignore.py b/pathspec/gitignore.py
index 908a9bd..3e0e0dc 100644
--- a/pathspec/gitignore.py
+++ b/pathspec/gitignore.py
@@ -9,6 +9,7 @@
 	Collection,
 	Iterable,
 	TYPE_CHECKING,
+	TypeVar,
 	Union)
 
 from .pathspec import (
@@ -22,6 +23,8 @@
 from .util import (
 	_is_iterable)
 
+Self = TypeVar("Self")
+
 
 class GitIgnoreSpec(PathSpec):
 	"""
@@ -29,7 +32,7 @@ class GitIgnoreSpec(PathSpec):
 	replicate *.gitignore* behavior.
 	"""
 
-	def __eq__(self, other: 'Self') -> bool:
+	def __eq__(self, other: object) -> bool:
 		"""
 		Tests the equality of this gitignore-spec with *other*
 		(:class:`GitIgnoreSpec`) by comparing their :attr:`~PathSpec.patterns`
@@ -44,10 +47,10 @@ def __eq__(self, other: 'Self') -> bool:
 
 	@classmethod
 	def from_lines(
-		cls,
+		cls: type[Self],
 		lines: Iterable[AnyStr],
 		pattern_factory: Union[str, Callable[[AnyStr], Pattern], None] = None,
-	) -> 'Self':
+	) -> Self:
 		"""
 		Compiles the pattern lines.
 
@@ -126,13 +129,3 @@ def _match_file(
 						out_priority = priority
 
 		return out_matched
-
-
-if TYPE_CHECKING:
-	try:
-		from typing import Self
-	except ImportError:
-		try:
-			from typing_extensions import Self
-		except ImportError:
-			Self = GitIgnoreSpec
diff --git a/pathspec/pathspec.py b/pathspec/pathspec.py
index d740aa8..f16f45b 100644
--- a/pathspec/pathspec.py
+++ b/pathspec/pathspec.py
@@ -17,6 +17,7 @@
 	Iterator,
 	Optional,
 	TYPE_CHECKING,
+	TypeVar,
 	Union)
 
 from . import util
@@ -29,6 +30,8 @@
 	match_file,
 	normalize_file)
 
+Self = TypeVar("Self")
+
 
 class PathSpec(object):
 	"""
@@ -50,7 +53,7 @@ def __init__(self, patterns: Iterable[Pattern]) -> None:
 		contains the compiled patterns.
 		"""
 
-	def __eq__(self, other: 'Self') -> bool:
+	def __eq__(self, other: object) -> bool:
 		"""
 		Tests the equality of this path-spec with *other* (:class:`PathSpec`)
 		by comparing their :attr:`~PathSpec.patterns` attributes.
@@ -68,7 +71,7 @@ def __len__(self) -> int:
 		"""
 		return len(self.patterns)
 
-	def __add__(self, other: 'Self') -> 'Self':
+	def __add__(self: Self, other: "PathSpec") -> Self:
 		"""
 		Combines the :attr:`Pathspec.patterns` patterns from two
 		:class:`PathSpec` instances.
@@ -78,7 +81,7 @@ def __add__(self, other: 'Self') -> 'Self':
 		else:
 			return NotImplemented
 
-	def __iadd__(self, other: 'Self') -> 'Self':
+	def __iadd__(self: Self, other: "PathSpec") -> Self:
 		"""
 		Adds the :attr:`Pathspec.patterns` patterns from one :class:`PathSpec`
 		instance to this instance.
@@ -91,10 +94,10 @@ def __iadd__(self, other: 'Self') -> 'Self':
 
 	@classmethod
 	def from_lines(
-		cls,
+		cls: type[Self],
 		pattern_factory: Union[str, Callable[[AnyStr], Pattern]],
 		lines: Iterable[AnyStr],
-	) -> 'Self':
+	) -> Self:
 		"""
 		Compiles the pattern lines.
 
@@ -261,13 +264,3 @@ def match_tree_files(
 	# Alias `match_tree_files()` as `match_tree()` for backward
 	# compatibility before v0.3.2.
 	match_tree = match_tree_files
-
-
-if TYPE_CHECKING:
-	try:
-		from typing import Self
-	except ImportError:
-		try:
-			from typing_extensions import Self
-		except ImportError:
-			Self = PathSpec