diff --git a/poetry.lock b/poetry.lock
index fa155ad..dcee4a7 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -286,14 +286,14 @@ diagrams = ["jinja2", "railroad-diagrams"]
 
 [[package]]
 name = "pyproject-flake8"
-version = "0.0.1a4"
+version = "0.0.1a5"
 description = "pyproject-flake8 (`pflake8`), a monkey patching wrapper to connect flake8 with pyproject.toml configuration"
 category = "dev"
 optional = false
 python-versions = "*"
 
 [package.dependencies]
-flake8 = "*"
+flake8 = "<5.0.0"
 tomli = {version = "*", markers = "python_version < \"3.11\""}
 
 [[package]]
@@ -425,7 +425,7 @@ testing = ["func-timeout", "jaraco.itertools", "pytest (>=6)", "pytest-black (>=
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "e3129e6d452fa165ce3b68e716d717ac1aa720862083c9b709763e77eba8c2f2"
+content-hash = "c8370aabf4106b67204877f97e6cb37538b18a6c2b6599a020cd7672f0e894f3"
 
 [metadata.files]
 atomicwrites = [
@@ -619,8 +619,8 @@ pyparsing = [
     {file = "pyparsing-3.0.8.tar.gz", hash = "sha256:7bf433498c016c4314268d95df76c81b842a4cb2b276fa3312cfb1e1d85f6954"},
 ]
 pyproject-flake8 = [
-    {file = "pyproject-flake8-0.0.1a4.tar.gz", hash = "sha256:8ed9453f1d984cfe94c998f9840275359e29e7f435b8ddd188ae084e2dc1270c"},
-    {file = "pyproject_flake8-0.0.1a4-py2.py3-none-any.whl", hash = "sha256:1a8f94e18d08677ee780625049d9d00a9ee823661c6606caab8a383351037a75"},
+    {file = "pyproject-flake8-0.0.1a5.tar.gz", hash = "sha256:22542080ba90d4bd80ee060852db15a24aeea61c9a29ed7c16f5b59b0e47a03a"},
+    {file = "pyproject_flake8-0.0.1a5-py2.py3-none-any.whl", hash = "sha256:c843d760c49d7b270e9abda58a57765c031918a9d10da25aa43572f5d77cac43"},
 ]
 pytest = [
     {file = "pytest-7.1.2-py3-none-any.whl", hash = "sha256:13d0e3ccfc2b6e26be000cb6568c832ba67ba32e719443bfe725814d3c42433c"},
diff --git a/pyproject.toml b/pyproject.toml
index b3d4fe9..818bcbf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ autoflake = "^1.5.2"
 black = "^22.8"
 isort = "^5.10.1"
 mypy = "^0.971"
-pyproject-flake8 = "^0.0.1a3"
+pyproject-flake8 = "^0.0.1a5"
 pytest = "^7.1.2"
 pytest-clarity = "^1.0.1"
 pytest-cov = "^3.0.0"
@@ -72,7 +72,7 @@ ignore_missing_imports = true
 
 [tool.flake8]
 max-line-length = 120
-extend-ignore = "E203"
+extend-ignore = ["E203"]
 extend-exclude = """
 setup.py,
 """