diff --git a/konoha/__init__.py b/konoha/__init__.py
index 1896ffe..a0cd5b5 100644
--- a/konoha/__init__.py
+++ b/konoha/__init__.py
@@ -3,4 +3,4 @@
 from konoha.word_tokenizer import WordTokenizer  # NOQA
 
 
-__version__ = "4.0.0"
+__version__ = "4.1.0"
diff --git a/poetry.lock b/poetry.lock
index db427a6..07ec246 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1349,7 +1349,7 @@ description = "Fast, Extensible Progress Meter"
 name = "tqdm"
 optional = true
 python-versions = ">=2.6, !=3.0.*, !=3.1.*"
-version = "4.45.0"
+version = "4.46.0"
 
 [package.extras]
 dev = ["py-make (>=0.1.0)", "twine", "argopt", "pydoc-markdown"]
@@ -1455,6 +1455,7 @@ version = "1.1"
 [[package]]
 category = "main"
 description = "Backport of pathlib-compatible object wrapper for zip files"
+marker = "python_version < \"3.8\""
 name = "zipp"
 optional = false
 python-versions = ">=3.6"
@@ -2389,8 +2390,8 @@ torch = [
     {file = "torch-1.5.0-cp38-none-macosx_10_9_x86_64.whl", hash = "sha256:cb4412c6b00117ab5e014d07dac45b87f1e918e31fbb849e7e39f1f9140fff59"},
 ]
 tqdm = [
-    {file = "tqdm-4.45.0-py2.py3-none-any.whl", hash = "sha256:ea9e3fd6bd9a37e8783d75bfc4c1faf3c6813da6bd1c3e776488b41ec683af94"},
-    {file = "tqdm-4.45.0.tar.gz", hash = "sha256:00339634a22c10a7a22476ee946bbde2dbe48d042ded784e4d88e0236eca5d81"},
+    {file = "tqdm-4.46.0-py2.py3-none-any.whl", hash = "sha256:acdafb20f51637ca3954150d0405ff1a7edde0ff19e38fb99a80a66210d2a28f"},
+    {file = "tqdm-4.46.0.tar.gz", hash = "sha256:4733c4a10d0f2a4d098d801464bdaf5240c7dadd2a7fde4ee93b0a0efd9fb25e"},
 ]
 traitlets = [
     {file = "traitlets-4.3.3-py2.py3-none-any.whl", hash = "sha256:70b4c6a1d9019d7b4f6846832288f86998aa3b9207c6821f3578a6a6a467fe44"},
diff --git a/pyproject.toml b/pyproject.toml
index 14693bb..4268b17 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,8 +1,8 @@
 [tool.poetry]
 name = "konoha"
-version = "4.0.0"
+version = "4.1.0"
 description = "A tiny sentence/word tokenizer for Japanese text written in Python"
-authors = ["himkt <himkt@cookpad.com>"]
+authors = ["himkt <himkt@klis.tsukuba.ac.jp>"]
 
 [tool.poetry.dependencies]
 python = "^3.6.1"