diff --git a/dataproperty/__version__.py b/dataproperty/__version__.py
index d2fff4c..55844af 100644
--- a/dataproperty/__version__.py
+++ b/dataproperty/__version__.py
@@ -1,6 +1,6 @@
 __author__ = "Tsuyoshi Hombashi"
 __copyright__ = f"Copyright 2016, {__author__}"
 __license__ = "MIT License"
-__version__ = "0.54.2"
+__version__ = "0.55.0"
 __maintainer__ = __author__
 __email__ = "tsuyoshi.hombashi@gmail.com"