diff --git a/src/kennard_stone/__init__.py b/src/kennard_stone/__init__.py
index eaadef7..57e7315 100644
--- a/src/kennard_stone/__init__.py
+++ b/src/kennard_stone/__init__.py
@@ -7,13 +7,13 @@
 
 from ._core._core import KFold, train_test_split
 
-__version__ = "3.0.0rc1"
+__version__ = "3.0.0"
 __license__ = "MIT"
 __author__ = "yu9824"
 __copyright__ = "Copyright © 2021 yu9824"
 __url__ = "https://github.com/yu9824/kennard_stone"
 
-__all__ = [
+__all__ = (
     "KFold",
     "train_test_split",
-]
+)