diff --git a/typepy/__version__.py b/typepy/__version__.py
index 7819485..63f6c7e 100644
--- a/typepy/__version__.py
+++ b/typepy/__version__.py
@@ -6,6 +6,6 @@
 __author__ = "Tsuyoshi Hombashi"
 __copyright__ = "Copyright 2017-{}, {}".format(datetime.now().year, __author__)
 __license__ = "MIT License"
-__version__ = "0.4.1"
+__version__ = "0.4.2"
 __maintainer__ = __author__
 __email__ = "tsuyoshi.hombashi@gmail.com"