diff --git a/poetry.lock b/poetry.lock
index b9b7bd8..656fe40 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -58,7 +58,7 @@ name = "bcrypt"
 version = "3.2.0"
 description = "Modern password hashing for your software and your servers"
 category = "dev"
-optional = false
+optional = true
 python-versions = ">=3.6"
 
 [package.dependencies]
@@ -101,7 +101,7 @@ name = "cffi"
 version = "1.14.2"
 description = "Foreign Function Interface for Python calling C code."
 category = "dev"
-optional = false
+optional = true
 python-versions = "*"
 
 [package.dependencies]
@@ -128,7 +128,7 @@ name = "cryptography"
 version = "3.3.2"
 description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
 category = "dev"
-optional = false
+optional = true
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*"
 
 [package.dependencies]
@@ -169,17 +169,17 @@ testing = ["mock (>=2.0.0,<3.0)"]
 
 [[package]]
 name = "flake8"
-version = "3.9.2"
+version = "4.0.1"
 description = "the modular source code checker: pep8 pyflakes and co"
 category = "dev"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+python-versions = ">=3.6"
 
 [package.dependencies]
-importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
+importlib-metadata = {version = "<4.3", markers = "python_version < \"3.8\""}
 mccabe = ">=0.6.0,<0.7.0"
-pycodestyle = ">=2.7.0,<2.8.0"
-pyflakes = ">=2.3.0,<2.4.0"
+pycodestyle = ">=2.8.0,<2.9.0"
+pyflakes = ">=2.4.0,<2.5.0"
 
 [[package]]
 name = "importlib-metadata"
@@ -306,7 +306,7 @@ name = "paramiko"
 version = "2.10.1"
 description = "SSH2 protocol library"
 category = "dev"
-optional = false
+optional = true
 python-versions = "*"
 
 [package.dependencies]
@@ -384,18 +384,18 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pycodestyle"
-version = "2.7.0"
+version = "2.8.0"
 description = "Python style guide checker"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "pycparser"
 version = "2.20"
 description = "C parser in Python"
 category = "dev"
-optional = false
+optional = true
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
@@ -415,7 +415,7 @@ email = ["email-validator (>=1.0.3)"]
 
 [[package]]
 name = "pyflakes"
-version = "2.3.1"
+version = "2.4.0"
 description = "passive checker of Python programs"
 category = "dev"
 optional = false
@@ -443,7 +443,7 @@ name = "pynacl"
 version = "1.4.0"
 description = "Python binding to the Networking and Cryptography (NaCl) library"
 category = "dev"
-optional = false
+optional = true
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.dependencies]
@@ -655,7 +655,7 @@ deploy = []
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "487822c75ec4197de839cef899ed8ba2d2f108a33d9a1b6b8c978d5252b1b849"
+content-hash = "c749dafc20bc83988eb3766c31fbf9943ddbc6fd55857b36472e0c42b497029b"
 
 [metadata.files]
 aenum = [
@@ -757,8 +757,8 @@ fabric = [
     {file = "fabric-2.6.0.tar.gz", hash = "sha256:47f184b070272796fd2f9f0436799e18f2ccba4ee8ee587796fca192acd46cd2"},
 ]
 flake8 = [
-    {file = "flake8-3.9.2-py2.py3-none-any.whl", hash = "sha256:bf8fd333346d844f616e8d47905ef3a3384edae6b4e9beb0c5101e25e3110907"},
-    {file = "flake8-3.9.2.tar.gz", hash = "sha256:07528381786f2a6237b061f6e96610a4167b226cb926e2aa2b6b1d78057c576b"},
+    {file = "flake8-4.0.1-py2.py3-none-any.whl", hash = "sha256:479b1304f72536a55948cb40a32dce8bb0ffe3501e26eaf292c7e60eb5e0428d"},
+    {file = "flake8-4.0.1.tar.gz", hash = "sha256:806e034dda44114815e23c16ef92f95c91e4c71100ff52813adf7132a6ad870d"},
 ]
 importlib-metadata = [
     {file = "importlib_metadata-1.7.0-py2.py3-none-any.whl", hash = "sha256:dc15b2969b4ce36305c51eebe62d418ac7791e9a157911d58bfb1f9ccd8e2070"},
@@ -867,8 +867,8 @@ py = [
     {file = "py-1.10.0.tar.gz", hash = "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3"},
 ]
 pycodestyle = [
-    {file = "pycodestyle-2.7.0-py2.py3-none-any.whl", hash = "sha256:514f76d918fcc0b55c6680472f0a37970994e07bbb80725808c17089be302068"},
-    {file = "pycodestyle-2.7.0.tar.gz", hash = "sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef"},
+    {file = "pycodestyle-2.8.0-py2.py3-none-any.whl", hash = "sha256:720f8b39dde8b293825e7ff02c475f3077124006db4f440dcbc9a20b76548a20"},
+    {file = "pycodestyle-2.8.0.tar.gz", hash = "sha256:eddd5847ef438ea1c7870ca7eb78a9d47ce0cdb4851a5523949f2601d0cbbe7f"},
 ]
 pycparser = [
     {file = "pycparser-2.20-py2.py3-none-any.whl", hash = "sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705"},
@@ -912,8 +912,8 @@ pydantic = [
     {file = "pydantic-1.9.0.tar.gz", hash = "sha256:742645059757a56ecd886faf4ed2441b9c0cd406079c2b4bee51bcc3fbcd510a"},
 ]
 pyflakes = [
-    {file = "pyflakes-2.3.1-py2.py3-none-any.whl", hash = "sha256:7893783d01b8a89811dd72d7dfd4d84ff098e5eed95cfa8905b22bbffe52efc3"},
-    {file = "pyflakes-2.3.1.tar.gz", hash = "sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db"},
+    {file = "pyflakes-2.4.0-py2.py3-none-any.whl", hash = "sha256:3bb3a3f256f4b7968c9c788781e4ff07dce46bdf12339dcda61053375426ee2e"},
+    {file = "pyflakes-2.4.0.tar.gz", hash = "sha256:05a85c2872edf37a4ed30b0cce2f6093e1d0581f8c19d7393122da7e25b2b24c"},
 ]
 pylint = [
     {file = "pylint-2.12.2-py3-none-any.whl", hash = "sha256:daabda3f7ed9d1c60f52d563b1b854632fd90035bcf01443e234d3dc794e3b74"},
diff --git a/pyproject.toml b/pyproject.toml
index 8971bfc..6ccbe00 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ pytest-watch = "^4.2.0"
 fabric = {version = "^2.6.0", optional = true}
 pytest-asyncio = "^0.17.2"
 mock = "^4.0.3"
-flake8 = "^3.9.2"
+flake8 = "^4.0.1"
 isort = "^5.9.3"
 
 [tool.poetry.extras]