diff --git a/poetry.lock b/poetry.lock
index 5b348138..14888089 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -413,6 +413,20 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "flake8"
+version = "3.8.4"
+description = "the modular source code checker: pep8 pyflakes and co"
+category = "dev"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+
+[package.dependencies]
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
+mccabe = ">=0.6.0,<0.7.0"
+pycodestyle = ">=2.6.0a1,<2.7.0"
+pyflakes = ">=2.2.0,<2.3.0"
+
 [[package]]
 name = "flask"
 version = "1.1.2"
@@ -880,6 +894,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
 
+[[package]]
+name = "mccabe"
+version = "0.6.1"
+description = "McCabe checker, plugin for flake8"
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "memory-profiler"
 version = "0.57.0"
@@ -1119,6 +1141,14 @@ python-versions = "*"
 [package.dependencies]
 pyasn1 = ">=0.4.6,<0.5.0"
 
+[[package]]
+name = "pycodestyle"
+version = "2.6.0"
+description = "Python style guide checker"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
 [[package]]
 name = "pycparser"
 version = "2.20"
@@ -1135,6 +1165,14 @@ category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package]]
+name = "pyflakes"
+version = "2.2.0"
+description = "passive checker of Python programs"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
 [[package]]
 name = "pygments"
 version = "2.7.1"
@@ -1690,7 +1728,7 @@ testing = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "f1d1febeb8977d9365d17ea9bbbf88de19e5c24784f6769c13f44df0411347bc"
+content-hash = "9ead7e73c3472edd0f5ebcfbcd480f2b7d6c601b3c25d58bb29c989bf682945b"
 
 [metadata.files]
 aiohttp = [
@@ -1935,6 +1973,10 @@ filelock = [
     {file = "filelock-3.0.12-py3-none-any.whl", hash = "sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836"},
     {file = "filelock-3.0.12.tar.gz", hash = "sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59"},
 ]
+flake8 = [
+    {file = "flake8-3.8.4-py2.py3-none-any.whl", hash = "sha256:749dbbd6bfd0cf1318af27bf97a14e28e5ff548ef8e5b1566ccfb25a11e7c839"},
+    {file = "flake8-3.8.4.tar.gz", hash = "sha256:aadae8761ec651813c24be05c6f7b4680857ef6afaae4651a4eccaef97ce6c3b"},
+]
 flask = [
     {file = "Flask-1.1.2-py2.py3-none-any.whl", hash = "sha256:8a4fdd8936eba2512e9c85df320a37e694c93945b33ef33c89946a340a238557"},
     {file = "Flask-1.1.2.tar.gz", hash = "sha256:4efa1ae2d7c9865af48986de8aeb8504bf32c7f3d6fdc9353d34b21f4b127060"},
@@ -2147,6 +2189,10 @@ markupsafe = [
     {file = "MarkupSafe-1.1.1-cp38-cp38-win_amd64.whl", hash = "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be"},
     {file = "MarkupSafe-1.1.1.tar.gz", hash = "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b"},
 ]
+mccabe = [
+    {file = "mccabe-0.6.1-py2.py3-none-any.whl", hash = "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42"},
+    {file = "mccabe-0.6.1.tar.gz", hash = "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"},
+]
 memory-profiler = [
     {file = "memory_profiler-0.57.0.tar.gz", hash = "sha256:23b196f91ea9ac9996e30bfab1e82fecc30a4a1d24870e81d1e81625f786a2c3"},
 ]
@@ -2331,6 +2377,10 @@ pyasn1-modules = [
     {file = "pyasn1_modules-0.2.8-py3.6.egg", hash = "sha256:cbac4bc38d117f2a49aeedec4407d23e8866ea4ac27ff2cf7fb3e5b570df19e0"},
     {file = "pyasn1_modules-0.2.8-py3.7.egg", hash = "sha256:c29a5e5cc7a3f05926aff34e097e84f8589cd790ce0ed41b67aed6857b26aafd"},
 ]
+pycodestyle = [
+    {file = "pycodestyle-2.6.0-py2.py3-none-any.whl", hash = "sha256:2295e7b2f6b5bd100585ebcb1f616591b652db8a741695b3d8f5d28bdc934367"},
+    {file = "pycodestyle-2.6.0.tar.gz", hash = "sha256:c58a7d2815e0e8d7972bf1803331fb0152f867bd89adf8a01dfd55085434192e"},
+]
 pycparser = [
     {file = "pycparser-2.20-py2.py3-none-any.whl", hash = "sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705"},
     {file = "pycparser-2.20.tar.gz", hash = "sha256:2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0"},
@@ -2372,6 +2422,10 @@ pycryptodome = [
     {file = "pycryptodome-3.9.8-cp39-cp39-manylinux2014_aarch64.whl", hash = "sha256:9f62d21bc693f3d7d444f17ed2ad7a913b4c37c15cd807895d013c39c0517dfd"},
     {file = "pycryptodome-3.9.8.tar.gz", hash = "sha256:0e24171cf01021bc5dc17d6a9d4f33a048f09d62cc3f62541e95ef104588bda4"},
 ]
+pyflakes = [
+    {file = "pyflakes-2.2.0-py2.py3-none-any.whl", hash = "sha256:0d94e0e05a19e57a99444b6ddcf9a6eb2e5c68d3ca1e98e90707af8152c90a92"},
+    {file = "pyflakes-2.2.0.tar.gz", hash = "sha256:35b2d75ee967ea93b55750aa9edbbf72813e06a66ba54438df2cfac9e3c27fc8"},
+]
 pygments = [
     {file = "Pygments-2.7.1-py3-none-any.whl", hash = "sha256:307543fe65c0947b126e83dd5a61bd8acbd84abec11f43caebaf5534cbc17998"},
     {file = "Pygments-2.7.1.tar.gz", hash = "sha256:926c3f319eda178d1bd90851e4317e6d8cdb5e292a3386aac9bd75eca29cf9c7"},
diff --git a/pyproject.toml b/pyproject.toml
index 425ab381..94594839 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -81,6 +81,7 @@ pytest = "^6.1.0"
 black = "^20.8b1"
 pre-commit = "^2.7.1"
 pytest-cov = "^2.10.1"
+flake8 = "^3.8.4"
 
 [build-system]
 requires = ["poetry>=0.12"]