diff --git a/.tool-versions b/.tool-versions
index 154b924e..e6e11b35 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-python 3.10.12
+python 3.12.0
 poetry 1.6.1
diff --git a/poetry.lock b/poetry.lock
index cbe14c74..8b3eaf68 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -87,7 +87,6 @@ files = [
 
 [package.dependencies]
 pyflakes = ">=3.0.0"
-tomli = {version = ">=2.0.1", markers = "python_version < \"3.11\""}
 
 [[package]]
 name = "babel"
@@ -173,8 +172,6 @@ mypy-extensions = ">=0.4.3"
 packaging = ">=22.0"
 pathspec = ">=0.9.0"
 platformdirs = ">=2"
-tomli = {version = ">=1.1.0", markers = "python_version < \"3.11\""}
-typing-extensions = {version = ">=4.0.1", markers = "python_version < \"3.11\""}
 
 [package.extras]
 colorama = ["colorama (>=0.4.3)"]
@@ -504,9 +501,6 @@ files = [
     {file = "coverage-7.3.2.tar.gz", hash = "sha256:be32ad29341b0170e795ca590e1c07e81fc061cb5b10c74ce7203491484404ef"},
 ]
 
-[package.dependencies]
-tomli = {version = "*", optional = true, markers = "python_full_version <= \"3.11.0a6\" and extra == \"toml\""}
-
 [package.extras]
 toml = ["tomli"]
 
@@ -610,21 +604,6 @@ typing-extensions = ">=3.7.4.1"
 all = ["pytz (>=2019.1)"]
 dates = ["pytz (>=2019.1)"]
 
-[[package]]
-name = "exceptiongroup"
-version = "1.1.3"
-description = "Backport of PEP 654 (exception groups)"
-category = "dev"
-optional = false
-python-versions = ">=3.7"
-files = [
-    {file = "exceptiongroup-1.1.3-py3-none-any.whl", hash = "sha256:343280667a4585d195ca1cf9cef84a4e178c4b6cf2274caef9859782b567d5e3"},
-    {file = "exceptiongroup-1.1.3.tar.gz", hash = "sha256:097acd85d473d75af5bb98e41b61ff7fe35efe6675e4f9370ec6ec5126d160e9"},
-]
-
-[package.extras]
-test = ["pytest (>=6)"]
-
 [[package]]
 name = "executing"
 version = "2.0.0"
@@ -705,7 +684,6 @@ files = [
 [package.dependencies]
 black = ">=22.1.0"
 flake8 = ">=3"
-tomli = {version = "*", markers = "python_version < \"3.11\""}
 
 [package.extras]
 develop = ["build", "twine"]
@@ -1079,7 +1057,6 @@ appnope = {version = "*", markers = "sys_platform == \"darwin\""}
 backcall = "*"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
 decorator = "*"
-exceptiongroup = {version = "*", markers = "python_version < \"3.11\""}
 jedi = ">=0.16"
 matplotlib-inline = "*"
 pexpect = {version = ">4.3", markers = "sys_platform != \"win32\""}
@@ -1366,7 +1343,6 @@ files = [
 
 [package.dependencies]
 mypy-extensions = ">=1.0.0"
-tomli = {version = ">=1.1.0", markers = "python_version < \"3.11\""}
 typing-extensions = ">=4.1.0"
 
 [package.extras]
@@ -1711,7 +1687,6 @@ files = [
 
 [package.dependencies]
 packaging = ">=23.1"
-tomli = {version = ">=2.0.1", markers = "python_version < \"3.11\""}
 
 [package.extras]
 docs = ["furo (>=2023.8.19)", "sphinx (<7.2)", "sphinx-autodoc-typehints (>=1.24)"]
@@ -1731,7 +1706,6 @@ files = [
 
 [package.dependencies]
 flake8 = "6.1.0"
-tomli = {version = "*", markers = "python_version < \"3.11\""}
 
 [[package]]
 name = "pytest"
@@ -1747,11 +1721,9 @@ files = [
 
 [package.dependencies]
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
-exceptiongroup = {version = ">=1.0.0rc8", markers = "python_version < \"3.11\""}
 iniconfig = "*"
 packaging = "*"
 pluggy = ">=0.12,<2.0"
-tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
 
 [package.extras]
 testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "setuptools", "xmlschema"]
@@ -2088,7 +2060,6 @@ files = [
 [package.dependencies]
 packaging = "*"
 setuptools = "*"
-toml = {version = ">=0.10.2", markers = "python_version < \"3.11\""}
 
 [[package]]
 name = "six"
@@ -2367,7 +2338,7 @@ tomli = {version = ">=2.0.1,<3.0.0", markers = "python_version >= \"3.7\" and py
 name = "toml"
 version = "0.10.2"
 description = "Python Library for Tom's Obvious, Minimal Language"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
@@ -2429,7 +2400,6 @@ packaging = ">=23.1"
 platformdirs = ">=3.10"
 pluggy = ">=1.3"
 pyproject-api = ">=1.6.1"
-tomli = {version = ">=2.0.1", markers = "python_version < \"3.11\""}
 virtualenv = ">=20.24.3"
 
 [package.extras]
@@ -2562,5 +2532,5 @@ files = [
 
 [metadata]
 lock-version = "2.0"
-python-versions = "~3.10"
-content-hash = "8e3ad8690f3587bcf3ed8c504c8649acbc89e41f5ca33f037d2fb9a36a378c31"
+python-versions = "~3.12.0"
+content-hash = "393521fa20b442af6d1ef89564955f119ea7b5d5d4f8b1b6d808177c3cf1c6b7"
diff --git a/pyproject.toml b/pyproject.toml
index bdb4aaa7..26fb14dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ description                = "Python を開発する時用ボイラープレー
 name                       = "Naoki Aoyama"
 
 [tool.poetry.dependencies]
-python                     = "~3.10"
+python                     = "~3.12.0"
 
 setuptools-git-versioning  = "~1.13.1"