diff --git a/allpairspy/__version__.py b/allpairspy/__version__.py
index 618e6d3..658369e 100644
--- a/allpairspy/__version__.py
+++ b/allpairspy/__version__.py
@@ -3,4 +3,4 @@
 __maintainer__ = "Tsuyoshi Hombashi"
 __maintainer_email__ = "tsuyoshi.hombashi@gmail.com"
 __license__ = "MIT License"
-__version__ = "2.5.0"
+__version__ = "2.5.1"