diff --git a/rithm/_enums.py b/rithm/_enums.py
index 22d4db6..2b595e0 100644
--- a/rithm/_enums.py
+++ b/rithm/_enums.py
@@ -25,9 +25,10 @@ def __init_subclass__(cls, /, **_kwargs: Any) -> NoReturn:
         )
 
     def __new__(cls, value: int, /) -> Self:
-        if not isinstance(value, int):
-            raise TypeError(type(value))
-        if not (0 <= value < len(get_type_hints(cls, globals()))):
+        if not (
+            isinstance(value, int)
+            and 0 <= value < len(get_type_hints(cls, globals()))
+        ):
             raise ValueError(f'{value} is not a valid {cls.__qualname__}')
         try:
             return cls._cache[value]
@@ -37,6 +38,9 @@ def __new__(cls, value: int, /) -> Self:
             cls._cache[value] = self
             return self
 
+    def __getnewargs__(self) -> tuple[int]:
+        return (self._value,)
+
     def __repr__(self) -> str:
         name = next(
             name for name, field in vars(type(self)).items() if field is self
@@ -70,9 +74,10 @@ def __init_subclass__(cls, /, **_kwargs: Any) -> NoReturn:
         )
 
     def __new__(cls, value: int, /) -> Self:
-        if not isinstance(value, int):
-            raise TypeError(type(value))
-        if not (0 <= value < len(get_type_hints(cls, globals()))):
+        if not (
+            isinstance(value, int)
+            and 0 <= value < len(get_type_hints(cls, globals()))
+        ):
             raise ValueError(f'{value} is not a valid {cls.__qualname__}')
         try:
             return cls._cache[value]
@@ -82,6 +87,9 @@ def __new__(cls, value: int, /) -> Self:
             cls._cache[value] = self
             return self
 
+    def __getnewargs__(self) -> tuple[int]:
+        return (self._value,)
+
     def __repr__(self) -> str:
         name = next(
             name for name, field in vars(type(self)).items() if field is self