diff --git a/poetry.lock b/poetry.lock
index 3e4b6ed..27eab71 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -6,14 +6,6 @@ category = "dev"
 optional = false
 python-versions = "*"
 
-[[package]]
-name = "atomicwrites"
-version = "1.4.1"
-description = "Atomic file writes."
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-
 [[package]]
 name = "attrs"
 version = "22.1.0"
@@ -87,6 +79,17 @@ category = "dev"
 optional = false
 python-versions = ">=3.5"
 
+[[package]]
+name = "exceptiongroup"
+version = "1.0.0rc9"
+description = "Backport of PEP 654 (exception groups)"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+test = ["pytest (>=6)"]
+
 [[package]]
 name = "flake8"
 version = "4.0.1"
@@ -379,14 +382,6 @@ category = "dev"
 optional = false
 python-versions = "*"
 
-[[package]]
-name = "py"
-version = "1.11.0"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-
 [[package]]
 name = "pycodestyle"
 version = "2.8.0"
@@ -427,25 +422,24 @@ diagrams = ["railroad-diagrams", "jinja2"]
 
 [[package]]
 name = "pytest"
-version = "6.2.5"
+version = "7.2.0"
 description = "pytest: simple powerful testing with Python"
 category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.7"
 
 [package.dependencies]
-atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=19.2.0"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
+exceptiongroup = {version = ">=1.0.0rc8", markers = "python_version < \"3.11\""}
 importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 iniconfig = "*"
 packaging = "*"
 pluggy = ">=0.12,<2.0"
-py = ">=1.8.2"
-toml = "*"
+tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
 
 [package.extras]
-testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
+testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "xmlschema"]
 
 [[package]]
 name = "regex"
@@ -455,14 +449,6 @@ category = "main"
 optional = false
 python-versions = ">=3.6"
 
-[[package]]
-name = "toml"
-version = "0.10.2"
-description = "Python Library for Tom's Obvious, Minimal Language"
-category = "dev"
-optional = false
-python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-
 [[package]]
 name = "tomli"
 version = "2.0.1"
@@ -535,17 +521,17 @@ mecab = ["mecab-python3", "ipadic", "mecab-ko-dic"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "3696519ef6dd938e37966b6c0a29e30de8eaf0c71e50b95797c9d806fe919014"
+content-hash = "3701c1761f9f8e16cefafdfdf04e64cb436dc96cda64fc524ed9c8b8204046a6"
 
 [metadata.files]
 appnope = []
-atomicwrites = []
 attrs = []
 backcall = []
 black = []
 click = []
 colorama = []
 decorator = []
+exceptiongroup = []
 flake8 = []
 ftfy = []
 importlib-metadata = []
@@ -571,14 +557,12 @@ platformdirs = []
 pluggy = []
 prompt-toolkit = []
 ptyprocess = []
-py = []
 pycodestyle = []
 pyflakes = []
 pygments = []
 pyparsing = []
 pytest = []
 regex = []
-toml = []
 tomli = []
 traitlets = []
 typed-ast = []
diff --git a/pyproject.toml b/pyproject.toml
index 022f262..edaa13d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ mecab-ko-dic = {version = "^1.0.0", optional = true}
 jieba = {version = ">=0.42", optional = true}
 
 [tool.poetry.dev-dependencies]
-pytest = "^6.2.5"
+pytest = "^7.2.0"
 mecab-python3 = "^1.0.4"
 jieba = ">= 0.42"
 ipadic = "^1.0.0"