diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 86b836c..496014e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ jobs:
   test:
     strategy:
       matrix:
-        py_ver: ['3.8', '3.9', '3.10', '3.11']
+        py_ver: ['3.8', '3.9', '3.10', '3.11', '3.12']
     runs-on:  ubuntu-latest
     steps:
       - uses: actions/checkout@v4
diff --git a/pyproject.toml b/pyproject.toml
index 5a7d7bf..10a37c5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "tarina"
-version = "0.4.4"
+version = "0.5.0"
 description = "A collection of common utils for Arclet"
 authors = [
     {name = "RF-Tar-Railt", email = "rf_tar_railt@qq.com"},
diff --git a/src/tarina/_lru_c.pyi b/src/tarina/_lru_c.pyi
index 3099d6e..368d3b3 100644
--- a/src/tarina/_lru_c.pyi
+++ b/src/tarina/_lru_c.pyi
@@ -5,7 +5,10 @@ _VT = TypeVar("_VT")
 _T = TypeVar("_T")
 
 class LRU(Generic[_KT, _VT]):
-    def __init__(self, size: int, callback: Callable[[_KT, _VT], Any] | None = ...) -> None: ...
+    @overload
+    def __init__(self, size: int, callback: None = None) -> None: ...
+    @overload
+    def __init__(self, size: int, callback: Callable[[_KT, _VT], Any]) -> None: ...
     def clear(self) -> None: ...
     @overload
     def get(self, key: _KT) -> _VT | None: ...
diff --git a/src/tarina/_lru_py.py b/src/tarina/_lru_py.py
index 8eb7683..c820279 100644
--- a/src/tarina/_lru_py.py
+++ b/src/tarina/_lru_py.py
@@ -28,7 +28,7 @@ def get(self, key: _KT) -> _VT | None: ...
     @overload
     def get(self, key: _KT, instead: _VT | _T) -> _VT | _T: ...
 
-    def get(self, key: _KT, instead: _VT | _T | None = None):
+    def get(self, key: _KT, instead: _VT | _T | None = None)-> _VT | _T | None:
         if key in self.__cache:
             self.__cache.move_to_end(key, last=False)
             return self.__cache[key]
@@ -61,7 +61,7 @@ def pop(self, key: _KT) -> _VT | None: ...
     @overload
     def pop(self, key: _KT, default: _VT | _T) -> _VT | _T: ...
 
-    def pop(self, key: _KT, default: _VT | _T | None = None):
+    def pop(self, key: _KT, default: _VT | _T | None = None)-> _VT | _T:
         return self.__cache.pop(key, default)
 
     def popitem(self, least_recent: bool = True) -> tuple[_KT, _VT]:
diff --git a/src/tarina/lang/__main__.py b/src/tarina/lang/__main__.py
index 679deab..ccae5a2 100644
--- a/src/tarina/lang/__main__.py
+++ b/src/tarina/lang/__main__.py
@@ -186,7 +186,7 @@ def delete(args):
 
 
 def main():
-    parser = ArgumentParser(description="tarina.lang CLI tool")
+    parser = ArgumentParser(description="tarina-lang CLI tool")
 
     subparsers = parser.add_subparsers(dest="command")
 
diff --git a/src/tarina/lru.pyi b/src/tarina/lru.pyi
index edabedd..f630e1e 100644
--- a/src/tarina/lru.pyi
+++ b/src/tarina/lru.pyi
@@ -5,7 +5,10 @@ _VT = TypeVar("_VT")
 _T = TypeVar("_T")
 
 class LRU(Generic[_KT, _VT]):
-    def __init__(self, size: int, callback: Callable[[_KT, _VT], Any] | None = ...) -> None: ...
+    @overload
+    def __init__(self, size: int, callback: None = None) -> None: ...
+    @overload
+    def __init__(self, size: int, callback: Callable[[_KT, _VT], Any]) -> None: ...
     def clear(self) -> None: ...
     @overload
     def get(self, key: _KT) -> _VT: ...