diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index d1de0c3..d0911f9 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.3.0
+current_version = 0.3.1
 commit = True
 tag = True
 
diff --git a/README.rst b/README.rst
index bb7b493..500e2bc 100644
--- a/README.rst
+++ b/README.rst
@@ -31,9 +31,9 @@ Overview
     :alt: PyPI Package latest release
     :target: https://pypi.org/project/kotonoha
 
-.. |commits-since| image:: https://img.shields.io/github/commits-since/brunotoshio/kotonoha/v0.3.0.svg
+.. |commits-since| image:: https://img.shields.io/github/commits-since/brunotoshio/kotonoha/v0.3.1.svg
     :alt: Commits since latest release
-    :target: https://github.com/brunotoshio/kotonoha/compare/v0.3.0...master
+    :target: https://github.com/brunotoshio/kotonoha/compare/v0.3.1...master
 
 .. |wheel| image:: https://img.shields.io/pypi/wheel/kotonoha.svg
     :alt: PyPI Wheel
diff --git a/docs/conf.py b/docs/conf.py
index f6e2626..cce310f 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -26,7 +26,7 @@
 year = '2019'
 author = 'Bruno Toshio Sugano'
 copyright = '{0}, {1}'.format(year, author)
-version = release = '0.3.0'
+version = release = '0.3.1'
 
 pygments_style = 'trac'
 templates_path = ['.']
diff --git a/setup.py b/setup.py
index 695030d..47f9e6b 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@ def read(*names, **kwargs):
 
 setup(
     name='kotonoha',
-    version='0.3.0',
+    version='0.3.1',
     license='MIT license',
     description='Tools for preprocessing Japanese texts',
     long_description='%s\n%s' % (
diff --git a/src/kotonoha/__init__.py b/src/kotonoha/__init__.py
index 4801ebd..7035065 100644
--- a/src/kotonoha/__init__.py
+++ b/src/kotonoha/__init__.py
@@ -1,4 +1,4 @@
-__version__ = '0.3.0'
+__version__ = '0.3.1'
 
 from .kotonoha import Kotonoha  # NOQA
 from .mecab_handler import MeCabHandler  # NOQA