diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index fb7f118..65a6b8a 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,6 +1,6 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 0.50.0
+current_version = 0.51.0
 
 [bumpversion:file:pypinyin/__init__.py]
diff --git a/pypinyin/__init__.py b/pypinyin/__init__.py
index 7242ebc..6b19947 100644
--- a/pypinyin/__init__.py
+++ b/pypinyin/__init__.py
@@ -28,7 +28,7 @@
 )
 
 __title__ = 'pypinyin'
-__version__ = '0.50.0'
+__version__ = '0.51.0'
 __author__ = 'mozillazg, 闲耘'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2016 mozillazg, 闲耘'