diff --git a/tcconfig/__version__.py b/tcconfig/__version__.py
index 0369e0f..23db2e1 100644
--- a/tcconfig/__version__.py
+++ b/tcconfig/__version__.py
@@ -1,6 +1,6 @@
 __author__ = "Tsuyoshi Hombashi"
 __copyright__ = f"Copyright 2016, {__author__}"
 __license__ = "MIT License"
-__version__ = "0.28.0"
+__version__ = "0.28.1"
 __maintainer__ = __author__
 __email__ = "tsuyoshi.hombashi@gmail.com"