diff --git a/py/poetry.lock b/py/poetry.lock
index e7bd4899..3f620a15 100644
--- a/py/poetry.lock
+++ b/py/poetry.lock
@@ -15,10 +15,10 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.extras]
-dev = ["cloudpickle", "coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit"]
-docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
-tests = ["cloudpickle", "coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface"]
-tests_no_zope = ["cloudpickle", "coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins"]
+dev = ["cloudpickle", "coverage[toml] (>=5.0.2)", "furo", "hypothesis", "mypy", "pre-commit", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "six", "sphinx", "sphinx-notfound-page", "zope.interface"]
+docs = ["furo", "sphinx", "sphinx-notfound-page", "zope.interface"]
+tests = ["cloudpickle", "coverage[toml] (>=5.0.2)", "hypothesis", "mypy", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "six", "zope.interface"]
+tests-no-zope = ["cloudpickle", "coverage[toml] (>=5.0.2)", "hypothesis", "mypy", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "six"]
 
 [[package]]
 name = "black"
@@ -36,7 +36,7 @@ platformdirs = ">=2"
 tomli = ">=0.2.6,<2.0.0"
 typing-extensions = [
     {version = ">=3.10.0.0", markers = "python_version < \"3.10\""},
-    {version = "!=3.10.0.1", markers = "python_version >= \"3.10\""},
+    {version = ">=3.10.0.0,<3.10.0.1 || >3.10.0.1", markers = "python_version >= \"3.10\""},
 ]
 
 [package.extras]
@@ -95,10 +95,10 @@ optional = false
 python-versions = ">=3.6.1,<4.0"
 
 [package.extras]
-pipfile_deprecated_finder = ["pipreqs", "requirementslib"]
-requirements_deprecated_finder = ["pipreqs", "pip-api"]
 colors = ["colorama (>=0.4.3,<0.5.0)"]
+pipfile-deprecated-finder = ["pipreqs", "requirementslib"]
 plugins = ["setuptools"]
+requirements-deprecated-finder = ["pip-api", "pipreqs"]
 
 [[package]]
 name = "mccabe"
@@ -200,10 +200,10 @@ optional = false
 python-versions = "*"
 
 [package.extras]
-docs = ["sphinx", "sphinx-rtd-theme", "pygal-sphinx-directives"]
+docs = ["pygal-sphinx-directives", "sphinx", "sphinx-rtd-theme"]
 lxml = ["lxml"]
 png = ["cairosvg"]
-test = ["pyquery", "flask", "cairosvg", "lxml", "pygal-maps-world", "pygal-maps-fr", "pygal-maps-ch", "coveralls", "pytest-runner", "pytest-cov", "pytest-flake8", "pytest-isort", "pytest"]
+test = ["cairosvg", "coveralls", "flask", "lxml", "pygal-maps-ch", "pygal-maps-fr", "pygal-maps-world", "pyquery", "pytest", "pytest-cov", "pytest-flake8", "pytest-isort", "pytest-runner"]
 
 [[package]]
 name = "pygaljs"
@@ -247,11 +247,11 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xm
 
 [[package]]
 name = "pytest-benchmark"
-version = "3.4.1"
+version = "4.0.0"
 description = "A ``pytest`` fixture for benchmarking code. It will group the tests into rounds that are calibrated to the chosen timer."
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=3.7"
 
 [package.dependencies]
 py-cpuinfo = "*"
@@ -291,7 +291,7 @@ python-versions = ">=3.6"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.10"
-content-hash = "f6c4f014d9ea30fc8af91d7d57bc07d576cb60dab70f9d55ef05b69d90d6f1a9"
+content-hash = "2c9db2f596c7de4f73c85b3c5c6a5f7cd16cc4810678d84a37e5a5350e5a6829"
 
 [metadata.files]
 atomicwrites = [
@@ -382,8 +382,8 @@ pytest = [
     {file = "pytest-6.2.5.tar.gz", hash = "sha256:131b36680866a76e6781d13f101efb86cf674ebb9762eb70d3082b6f29889e89"},
 ]
 pytest-benchmark = [
-    {file = "pytest-benchmark-3.4.1.tar.gz", hash = "sha256:40e263f912de5a81d891619032983557d62a3d85843f9a9f30b98baea0cd7b47"},
-    {file = "pytest_benchmark-3.4.1-py2.py3-none-any.whl", hash = "sha256:36d2b08c4882f6f997fd3126a3d6dfd70f3249cde178ed8bbc0b73db7c20f809"},
+    {file = "pytest-benchmark-4.0.0.tar.gz", hash = "sha256:fb0785b83efe599a6a956361c0691ae1dbb5318018561af10f3e915caa0048d1"},
+    {file = "pytest_benchmark-4.0.0-py3-none-any.whl", hash = "sha256:fdb7db64e31c8b277dff9850d2a2556d8b60bcb0ea6524e36e28ffd7c87f71d6"},
 ]
 toml = [
     {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
diff --git a/py/pyproject.toml b/py/pyproject.toml
index 71bc3f48..5e365b44 100644
--- a/py/pyproject.toml
+++ b/py/pyproject.toml
@@ -24,7 +24,7 @@ black = "^21.12b0"
 flake8 = "^4.0.1"
 isort = "^5.10.1"
 pytest = "^6.2.5"
-pytest-benchmark = { version = "^3.4.1", extras = ["histogram"] }
+pytest-benchmark = { version = "^4.0.0", extras = ["histogram"] }
 
 [tool.poetry.scripts]
 aoc2021 = "aoc2021.main:main"