diff --git a/poetry.lock b/poetry.lock
index bd13a30..2f463db 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -181,14 +181,6 @@ optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 version = "0.15.2"
 
-[[package]]
-category = "dev"
-description = "Discover and load entry points from installed packages."
-name = "entrypoints"
-optional = false
-python-versions = ">=2.7"
-version = "0.3"
-
 [[package]]
 category = "main"
 description = "An implementation of lxml.xmlfile for the standard library"
@@ -199,17 +191,20 @@ version = "1.0.1"
 
 [[package]]
 category = "dev"
-description = "the modular source code checker: pep8, pyflakes and co"
+description = "the modular source code checker: pep8 pyflakes and co"
 name = "flake8"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "3.7.9"
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+version = "3.8.1"
 
 [package.dependencies]
-entrypoints = ">=0.3.0,<0.4.0"
 mccabe = ">=0.6.0,<0.7.0"
-pycodestyle = ">=2.5.0,<2.6.0"
-pyflakes = ">=2.1.0,<2.2.0"
+pycodestyle = ">=2.6.0a1,<2.7.0"
+pyflakes = ">=2.2.0,<2.3.0"
+
+[package.dependencies.importlib-metadata]
+python = "<3.8"
+version = "*"
 
 [[package]]
 category = "main"
@@ -393,7 +388,7 @@ description = "Python style guide checker"
 name = "pycodestyle"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.5.0"
+version = "2.6.0"
 
 [[package]]
 category = "dev"
@@ -401,7 +396,7 @@ description = "passive checker of Python programs"
 name = "pyflakes"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.1.1"
+version = "2.2.0"
 
 [[package]]
 category = "main"
@@ -631,7 +626,7 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["pathlib2", "contextlib2", "unittest2"]
 
 [metadata]
-content-hash = "564588a60f106ad73edd335e335189ba3afba10a04d13c7e399b0f1dcff4d122"
+content-hash = "bf30cadfb2de31b3c26926f4f64082b864d571d8d502dee31721ea4664038c6a"
 python-versions = "^3.6"
 
 [metadata.files]
@@ -748,16 +743,12 @@ docutils = [
     {file = "docutils-0.15.2-py3-none-any.whl", hash = "sha256:6c4f696463b79f1fb8ba0c594b63840ebd41f059e92b31957c46b74a4599b6d0"},
     {file = "docutils-0.15.2.tar.gz", hash = "sha256:a2aeea129088da402665e92e0b25b04b073c04b2dce4ab65caaa38b7ce2e1a99"},
 ]
-entrypoints = [
-    {file = "entrypoints-0.3-py2.py3-none-any.whl", hash = "sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19"},
-    {file = "entrypoints-0.3.tar.gz", hash = "sha256:c70dd71abe5a8c85e55e12c19bd91ccfeec11a6e99044204511f9ed547d48451"},
-]
 et-xmlfile = [
     {file = "et_xmlfile-1.0.1.tar.gz", hash = "sha256:614d9722d572f6246302c4491846d2c393c199cfa4edc9af593437691683335b"},
 ]
 flake8 = [
-    {file = "flake8-3.7.9-py2.py3-none-any.whl", hash = "sha256:49356e766643ad15072a789a20915d3c91dc89fd313ccd71802303fd67e4deca"},
-    {file = "flake8-3.7.9.tar.gz", hash = "sha256:45681a117ecc81e870cbf1262835ae4af5e7a8b08e40b944a8a6e6b895914cfb"},
+    {file = "flake8-3.8.1-py2.py3-none-any.whl", hash = "sha256:6c1193b0c3f853ef763969238f6c81e9e63ace9d024518edc020d5f1d6d93195"},
+    {file = "flake8-3.8.1.tar.gz", hash = "sha256:ea6623797bf9a52f4c9577d780da0bb17d65f870213f7b5bcc9fca82540c31d5"},
 ]
 idna = [
     {file = "idna-2.8-py2.py3-none-any.whl", hash = "sha256:ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"},
@@ -831,12 +822,12 @@ pybloom-live = [
     {file = "pybloom_live-3.0.0.tar.gz", hash = "sha256:837550da7c82adb14b901c56c3e131ad269250cd19850a53671e878bd0626c68"},
 ]
 pycodestyle = [
-    {file = "pycodestyle-2.5.0-py2.py3-none-any.whl", hash = "sha256:95a2219d12372f05704562a14ec30bc76b05a5b297b21a5dfe3f6fac3491ae56"},
-    {file = "pycodestyle-2.5.0.tar.gz", hash = "sha256:e40a936c9a450ad81df37f549d676d127b1b66000a6c500caa2b085bc0ca976c"},
+    {file = "pycodestyle-2.6.0-py2.py3-none-any.whl", hash = "sha256:2295e7b2f6b5bd100585ebcb1f616591b652db8a741695b3d8f5d28bdc934367"},
+    {file = "pycodestyle-2.6.0.tar.gz", hash = "sha256:c58a7d2815e0e8d7972bf1803331fb0152f867bd89adf8a01dfd55085434192e"},
 ]
 pyflakes = [
-    {file = "pyflakes-2.1.1-py2.py3-none-any.whl", hash = "sha256:17dbeb2e3f4d772725c777fabc446d5634d1038f234e77343108ce445ea69ce0"},
-    {file = "pyflakes-2.1.1.tar.gz", hash = "sha256:d976835886f8c5b31d47970ed689944a0262b5f3afa00a5a7b4dc81e5449f8a2"},
+    {file = "pyflakes-2.2.0-py2.py3-none-any.whl", hash = "sha256:0d94e0e05a19e57a99444b6ddcf9a6eb2e5c68d3ca1e98e90707af8152c90a92"},
+    {file = "pyflakes-2.2.0.tar.gz", hash = "sha256:35b2d75ee967ea93b55750aa9edbbf72813e06a66ba54438df2cfac9e3c27fc8"},
 ]
 pyrsistent = [
     {file = "pyrsistent-0.15.7.tar.gz", hash = "sha256:cdc7b5e3ed77bed61270a47d35434a30617b9becdf2478af76ad2c6ade307280"},
@@ -885,6 +876,24 @@ six = [
     {file = "six-1.13.0.tar.gz", hash = "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"},
 ]
 sqlalchemy = [
+    {file = "SQLAlchemy-1.3.16-cp27-cp27m-macosx_10_13_x86_64.whl", hash = "sha256:8d8c21e9d4efef01351bf28513648ceb988031be4159745a7ad1b3e28c8ff68a"},
+    {file = "SQLAlchemy-1.3.16-cp27-cp27m-win32.whl", hash = "sha256:083e383a1dca8384d0ea6378bd182d83c600ed4ff4ec8247d3b2442cf70db1ad"},
+    {file = "SQLAlchemy-1.3.16-cp27-cp27m-win_amd64.whl", hash = "sha256:128f6179325f7597a46403dde0bf148478f868df44841348dfc8d158e00db1f9"},
+    {file = "SQLAlchemy-1.3.16-cp36-cp36m-macosx_10_13_x86_64.whl", hash = "sha256:6056b671aeda3fc451382e52ab8a753c0d5f66ef2a5ccc8fa5ba7abd20988b4d"},
+    {file = "SQLAlchemy-1.3.16-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:7025c639ce7e170db845e94006cf5f404e243e6fc00d6c86fa19e8ad8d411880"},
+    {file = "SQLAlchemy-1.3.16-cp36-cp36m-manylinux2010_x86_64.whl", hash = "sha256:e18752cecaef61031252ca72031d4d6247b3212ebb84748fc5d1a0d2029c23ea"},
+    {file = "SQLAlchemy-1.3.16-cp36-cp36m-win32.whl", hash = "sha256:0a690a6486658d03cc6a73536d46e796b6570ac1f8a7ec133f9e28c448b69828"},
+    {file = "SQLAlchemy-1.3.16-cp36-cp36m-win_amd64.whl", hash = "sha256:d00b393f05dbd4ecd65c989b7f5a81110eae4baea7a6a4cdd94c20a908d1456e"},
+    {file = "SQLAlchemy-1.3.16-cp37-cp37m-macosx_10_13_x86_64.whl", hash = "sha256:114b6ace30001f056e944cebd46daef38fdb41ebb98f5e5940241a03ed6cad43"},
+    {file = "SQLAlchemy-1.3.16-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:13d48cd8b925b6893a4e59b2dfb3e59a5204fd8c98289aad353af78bd214db49"},
+    {file = "SQLAlchemy-1.3.16-cp37-cp37m-manylinux2010_x86_64.whl", hash = "sha256:211a1ce7e825f7142121144bac76f53ac28b12172716a710f4bf3eab477e730b"},
+    {file = "SQLAlchemy-1.3.16-cp37-cp37m-win32.whl", hash = "sha256:68d78cf4a9dfade2e6cf57c4be19f7b82ed66e67dacf93b32bb390c9bed12749"},
+    {file = "SQLAlchemy-1.3.16-cp37-cp37m-win_amd64.whl", hash = "sha256:2dc57ee80b76813759cccd1a7affedf9c4dbe5b065a91fb6092c9d8151d66078"},
+    {file = "SQLAlchemy-1.3.16-cp38-cp38-macosx_10_13_x86_64.whl", hash = "sha256:43078c7ec0457387c79b8d52fff90a7ad352ca4c7aa841c366238c3e2cf52fdf"},
+    {file = "SQLAlchemy-1.3.16-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:bbb545da054e6297242a1bb1ba88e7a8ffb679f518258d66798ec712b82e4e07"},
+    {file = "SQLAlchemy-1.3.16-cp38-cp38-manylinux2010_x86_64.whl", hash = "sha256:5b1bf3c2c2dca738235ce08079783ef04f1a7fc5b21cf24adaae77f2da4e73c3"},
+    {file = "SQLAlchemy-1.3.16-cp38-cp38-win32.whl", hash = "sha256:3e625e283eecc15aee5b1ef77203bfb542563fa4a9aa622c7643c7b55438ff49"},
+    {file = "SQLAlchemy-1.3.16-cp38-cp38-win_amd64.whl", hash = "sha256:7d98e0785c4cd7ae30b4a451416db71f5724a1839025544b4edbd92e00b91f0f"},
     {file = "SQLAlchemy-1.3.16.tar.gz", hash = "sha256:7224e126c00b8178dfd227bc337ba5e754b197a3867d33b9f30dc0208f773d70"},
 ]
 tableschema = [
diff --git a/pyproject.toml b/pyproject.toml
index 8d3d82f..6297bbf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ deepmerge = "==0.1.0"
 
 [tool.poetry.dev-dependencies]
 isort = "^4.3"
-flake8 = "^3.7.9"
+flake8 = "^3.8.1"
 black = { version = "==19.10b0", allow-prereleases = true }
 coveralls = "^2.0.0"