diff --git a/README.md b/README.md
index b812b19..102f919 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ enable_isort = true
 enable_mypy = true
 mypy_preset = "strict"
 line_length = 88
-py_version = "py37"
+py_version = "py38"
 [[tool.pysen.lint.mypy_targets]]
   paths = ["."]
 ```
@@ -215,7 +215,7 @@ enable_isort = true
 enable_mypy = true
 mypy_preset = "strict"
 line_length = 88
-py_version = "py37"
+py_version = "py38"
 isort_known_third_party = ["numpy"]
 isort_known_first_party = ["pysen"]
 mypy_ignore_packages = ["pysen.generated.*"]
diff --git a/assets/Dockerfile b/assets/Dockerfile
index abe3549..acd2bc2 100644
--- a/assets/Dockerfile
+++ b/assets/Dockerfile
@@ -1,17 +1,17 @@
 # Dockerfile for pysen-test
 FROM alpine:3.17
 
-COPY --from=python:3.7.16-alpine3.17 /usr/local/ /usr/local/
 COPY --from=python:3.8.16-alpine3.17 /usr/local/ /usr/local/
 COPY --from=python:3.9.16-alpine3.17 /usr/local/ /usr/local/
 COPY --from=python:3.10.11-alpine3.17 /usr/local/ /usr/local/
 COPY --from=python:3.11.3-alpine3.17 /usr/local/ /usr/local/
+COPY --from=python:3.12.0-alpine3.17 /usr/local/ /usr/local/
 
 RUN apk add --no-cache expat gcc libffi musl-dev \
-    && for MINOR in 7 8 9 10 11; do \
+    && for MINOR in 8 9 10 11 12; do \
     sed "s|^#!/usr/local/bin/python$|#!/usr/local/bin/python3.${MINOR}|" \
     -i /usr/local/bin/*3.${MINOR}; done
 
 RUN apk add --no-cache bash git \
-    && pip3.11 install --no-cache-dir tox==3.15.0
+    && pip3.12 install --no-cache-dir tox==3.15.0
 ENV TOX_PARALLEL_NO_SPINNER 1
diff --git a/examples/simple_package/pyproject.toml b/examples/simple_package/pyproject.toml
index 533b96b..9f99828 100644
--- a/examples/simple_package/pyproject.toml
+++ b/examples/simple_package/pyproject.toml
@@ -3,7 +3,7 @@ enable_black = true
 enable_mypy = true
 mypy_preset = "strict"
 line_length = 100
-py_version = "py37"
+py_version = "py38"
 
 [[tool.pysen.lint.mypy_targets]]
   paths = ["."]
diff --git a/examples/sync_cmdclass_pyproject/pyproject.toml b/examples/sync_cmdclass_pyproject/pyproject.toml
index 533b96b..9f99828 100644
--- a/examples/sync_cmdclass_pyproject/pyproject.toml
+++ b/examples/sync_cmdclass_pyproject/pyproject.toml
@@ -3,7 +3,7 @@ enable_black = true
 enable_mypy = true
 mypy_preset = "strict"
 line_length = 100
-py_version = "py37"
+py_version = "py38"
 
 [[tool.pysen.lint.mypy_targets]]
   paths = ["."]
diff --git a/pysen/dist_version.py b/pysen/dist_version.py
index f815c07..ba0c461 100644
--- a/pysen/dist_version.py
+++ b/pysen/dist_version.py
@@ -1,18 +1,17 @@
 import logging
+from importlib.metadata import Distribution, PackageNotFoundError, distribution
 from typing import Optional
 
-import pkg_resources
-
 from pysen.exceptions import DistributionNotFound
 from pysen.py_version import VersionRepresentation
 
 _logger = logging.getLogger(__name__)
 
 
-def _get_distro(name: str) -> Optional[pkg_resources.Distribution]:
+def _get_distro(name: str) -> Optional[Distribution]:
     try:
-        return pkg_resources.get_distribution(name)
-    except pkg_resources.DistributionNotFound:
+        return distribution(name)
+    except PackageNotFoundError:
         _logger.debug(f"distribution {name} not found", exc_info=True)
         return None
 
@@ -21,7 +20,7 @@ def get_version(name: str) -> VersionRepresentation:
     distro = _get_distro(name)
     if distro is None:
         raise DistributionNotFound(
-            f"Expected {name} to be installed but pkg_resources could not find it.\n"
+            f"Expected {name} to be installed but importlib could not find it.\n"
             f'Hint: Did you install "{name}" in the same Python environment as pysen?'
         )
     return VersionRepresentation.from_str(distro.version)
diff --git a/pysen/ext/black_wrapper.py b/pysen/ext/black_wrapper.py
index b4f4f4d..91a90d5 100644
--- a/pysen/ext/black_wrapper.py
+++ b/pysen/ext/black_wrapper.py
@@ -24,7 +24,7 @@ def default(
         # NOTE(igarashi) safe to use as an argument since it is immutable
         py_version: Optional[PythonVersion] = None,
     ) -> "BlackSetting":
-        py_version = py_version or PythonVersion(3, 7)
+        py_version = py_version or PythonVersion(3, 8)
         return BlackSetting(target_version=[py_version])
 
     def export(self) -> Tuple[List[str], Dict[str, Any]]:
diff --git a/pysen/ext/flake8_wrapper.py b/pysen/ext/flake8_wrapper.py
index 516c9a2..f2e4de9 100644
--- a/pysen/ext/flake8_wrapper.py
+++ b/pysen/ext/flake8_wrapper.py
@@ -92,7 +92,7 @@ def export(self) -> Tuple[Sequence[str], Dict[str, Any]]:
 @functools.lru_cache(1)
 def _check_flake8_version() -> None:
     version = get_version("flake8")
-    minimum_supported = VersionRepresentation(3, 7)
+    minimum_supported = VersionRepresentation(3, 8)
     if version < minimum_supported:
         raise IncompatibleVersionError(
             f"pysen only supports flake8 >= {minimum_supported}, "
diff --git a/pysen/factory.py b/pysen/factory.py
index f8de1e5..6f11a39 100644
--- a/pysen/factory.py
+++ b/pysen/factory.py
@@ -67,7 +67,7 @@ def configure_lint(options: ConfigureLintOptions) -> List[ComponentBase]:
     if options.py_version is not None:
         python_version = options.py_version
     else:
-        python_version = PythonVersion(3, 7)
+        python_version = PythonVersion(3, 8)
 
     line_length = options.line_length or 88
 
diff --git a/pysen/py_version.py b/pysen/py_version.py
index 6ce62f8..8432249 100644
--- a/pysen/py_version.py
+++ b/pysen/py_version.py
@@ -107,9 +107,9 @@ def parse_short_representation(value: str) -> "PythonVersion":
 # NOTE(igarashi): PythonVersion class is immutable
 _PythonVersions = {
     "PY27": PythonVersion(2, 7),
-    "PY37": PythonVersion(3, 7),
     "PY38": PythonVersion(3, 8),
     "PY39": PythonVersion(3, 9),
     "PY310": PythonVersion(3, 10),
     "PY311": PythonVersion(3, 11),
+    "PY312": PythonVersion(3, 12),
 }
diff --git a/setup.py b/setup.py
index 71f52c0..33271d9 100644
--- a/setup.py
+++ b/setup.py
@@ -22,11 +22,11 @@
     url="https://github.com/pfnet/pysen",
     license="MIT License",
     classifiers=[
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Programming Language :: Python",
         "License :: OSI Approved :: MIT License",
         "Operating System :: POSIX",
diff --git a/tests/fakes/configs/base.toml b/tests/fakes/configs/base.toml
index d37b7dd..f5d65df 100644
--- a/tests/fakes/configs/base.toml
+++ b/tests/fakes/configs/base.toml
@@ -2,7 +2,7 @@
 base = "base2.toml"
 enable_isort = true
 line_length = 88
-py_version = "py37"
+py_version = "py38"
 isort_known_third_party = ["fuga", "piyo"]
 isort_known_first_party = ["foo"]
 
diff --git a/tests/fakes/configs/example.toml b/tests/fakes/configs/example.toml
index e627490..929918f 100644
--- a/tests/fakes/configs/example.toml
+++ b/tests/fakes/configs/example.toml
@@ -10,7 +10,7 @@ enable_isort = true
 enable_mypy = true
 mypy_preset = "strict"
 line_length = 88
-py_version = "py37"
+py_version = "py38"
 isort_known_first_party = ["alpha"]
 isort_known_third_party = ["beta", "gamma"]
 mypy_ignore_packages = ["pysen.stubs", "pysen.proto"]
diff --git a/tests/fakes/configs/non_pysen_config.toml b/tests/fakes/configs/non_pysen_config.toml
index 4a5abf3..2ed0cf5 100644
--- a/tests/fakes/configs/non_pysen_config.toml
+++ b/tests/fakes/configs/non_pysen_config.toml
@@ -1,3 +1,3 @@
 [tool.nonpysen]
 line-length = 100
-target-version = ["py37"]
+target-version = ["py38"]
diff --git a/tests/test_isort.py b/tests/test_isort.py
index 64c9e99..f8a6a5f 100644
--- a/tests/test_isort.py
+++ b/tests/test_isort.py
@@ -1,7 +1,7 @@
+from importlib.metadata import PackageNotFoundError
 from pathlib import Path
 from unittest import mock
 
-import pkg_resources
 import pytest
 
 from pysen.exceptions import (
@@ -101,7 +101,7 @@ def get_version() -> VersionRepresentation:
         _get_isort_version.cache_clear()
         return _get_isort_version()
 
-    distro = "pkg_resources.get_distribution"
+    distro = "pysen.dist_version.distribution"
     # pass case
     with mock.patch(distro, return_value=mock.Mock(version="4.3.21")):
         assert get_version() == VersionRepresentation(4, 3, 21)
@@ -114,8 +114,6 @@ def get_version() -> VersionRepresentation:
     assert "version 3.0.0 is not supported" in str(e)
     # isort cannot be imported
     with pytest.raises(DistributionNotFound) as e:
-        with mock.patch(
-            distro, side_effect=pkg_resources.DistributionNotFound("req", "requires")
-        ):
+        with mock.patch(distro, side_effect=PackageNotFoundError("req", "requires")):
             get_version()
     assert "Expected isort to be installed" in str(e)
diff --git a/tests/test_py_version.py b/tests/test_py_version.py
index 63c5fa4..b347fe4 100644
--- a/tests/test_py_version.py
+++ b/tests/test_py_version.py
@@ -4,24 +4,24 @@
 
 
 def test_python_version() -> None:
-    py37 = PythonVersion(3, 7)
+    py38 = PythonVersion(3, 8)
 
-    assert py37 == PythonVersion(3, 7)
-    assert py37 != PythonVersion(3, 8)
+    assert py38 == PythonVersion(3, 8)
+    assert py38 != PythonVersion(3, 9)
 
-    assert py37.version == "3.7"
-    assert py37.full_representation == "Python3.7"
-    assert py37.short_representation == "py37"
+    assert py38.version == "3.8"
+    assert py38.full_representation == "Python3.8"
+    assert py38.short_representation == "py38"
 
-    py378 = PythonVersion(3, 7, 8)
+    py388 = PythonVersion(3, 8, 8)
 
-    assert py378 == PythonVersion(3, 7, 8)
-    assert py378 != PythonVersion(3, 7, 9)
-    assert py378 != py37
+    assert py388 == PythonVersion(3, 8, 8)
+    assert py388 != PythonVersion(3, 8, 9)
+    assert py388 != py38
 
-    assert py378.version == "3.7.8"
-    assert py378.full_representation == "Python3.7.8"
-    assert py378.short_representation == "py37"
+    assert py388.version == "3.8.8"
+    assert py388.full_representation == "Python3.8.8"
+    assert py388.short_representation == "py38"
 
 
 def test_version_ops() -> None:
diff --git a/tests/test_pyproject_model.py b/tests/test_pyproject_model.py
index f080652..9ee9629 100644
--- a/tests/test_pyproject_model.py
+++ b/tests/test_pyproject_model.py
@@ -138,7 +138,7 @@ def test__parse_source() -> None:
 
 
 def test__parse_python_version() -> None:
-    assert _parse_python_version("py37") == PythonVersion(3, 7)
+    assert _parse_python_version("py38") == PythonVersion(3, 8)
     assert _parse_python_version("PY38") == PythonVersion(3, 8)
     with pytest.raises(dacite.DaciteError) as ex:
         _parse_python_version("PY999")
@@ -146,7 +146,7 @@ def test__parse_python_version() -> None:
     assert "one of" in str(ex.value)  # ensure that we suggest some options
 
     with pytest.raises(dacite.WrongTypeError):
-        _parse_python_version(37)
+        _parse_python_version(38)
 
 
 def test__parse_mypy_target() -> None:
@@ -291,7 +291,7 @@ def test_example() -> None:
     assert lint.enable_mypy
     assert lint.line_length == 88
     assert isinstance(lint.line_length, int)
-    assert lint.py_version == PythonVersion(3, 7)
+    assert lint.py_version == PythonVersion(3, 8)
     assert lint.isort_known_first_party == ["alpha"]
     assert lint.isort_known_third_party == ["beta", "gamma"]
     assert lint.isort_default_section == IsortSectionName.THIRDPARTY
diff --git a/tox.ini b/tox.ini
index ac95d4e..e3c279f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py37-dacite{110,120,150}-isort43-black20-mypy078, py37-dacite150-isort{43,50,51}-black{19,20}-mypy078, py{38,39,310}-dacite150-isort51-black{20,22}-mypy078, py311-dacite150-isort51-black22-mypy099, development, latest
+envlist = py{38,39,310}-dacite150-isort51-black{20,22}-mypy078, py{311,312}-dacite150-isort51-black22-mypy099, development, latest
 
 [testenv]
 deps =
@@ -17,6 +17,7 @@ deps =
     mypy099: mypy==0.991
     flake8==4.0.1
     flake8-bugbear==21.9.2
+    setuptools>=66.1.0
 
 commands =
     pytest -m "not examples"