diff --git a/poetry.lock b/poetry.lock
index a6d9248..bb903eb 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -438,18 +438,19 @@ testing = ["async-generator (>=1.3)", "coverage", "hypothesis (>=5.7.1)"]
 
 [[package]]
 name = "pytest-cov"
-version = "2.10.1"
+version = "2.12.1"
 description = "Pytest plugin for measuring coverage."
 category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
-coverage = ">=4.4"
+coverage = ">=5.2.1"
 pytest = ">=4.6"
+toml = "*"
 
 [package.extras]
-testing = ["fields", "hunter", "process-tests (==2.0.2)", "six", "pytest-xdist", "virtualenv"]
+testing = ["fields", "hunter", "process-tests", "six", "pytest-xdist", "virtualenv"]
 
 [[package]]
 name = "pytest-fixture-config"
@@ -663,7 +664,7 @@ testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6"
-content-hash = "002aca745c1f5006a522282b181e681a8da6875eaacd3ed4593ac394c3dd36d6"
+content-hash = "a4cd0380bbd6aa4dd749be88f10ca513825f7aaa0a403b9de4daf5b3a3648c42"
 
 [metadata.files]
 aiohttp = [
@@ -947,8 +948,8 @@ pytest-asyncio = [
     {file = "pytest_asyncio-0.14.0-py3-none-any.whl", hash = "sha256:2eae1e34f6c68fc0a9dc12d4bea190483843ff4708d24277c41568d6b6044f1d"},
 ]
 pytest-cov = [
-    {file = "pytest-cov-2.10.1.tar.gz", hash = "sha256:47bd0ce14056fdd79f93e1713f88fad7bdcc583dcd7783da86ef2f085a0bb88e"},
-    {file = "pytest_cov-2.10.1-py2.py3-none-any.whl", hash = "sha256:45ec2d5182f89a81fc3eb29e3d1ed3113b9e9a873bcddb2a71faaab066110191"},
+    {file = "pytest-cov-2.12.1.tar.gz", hash = "sha256:261ceeb8c227b726249b376b8526b600f38667ee314f910353fa318caa01f4d7"},
+    {file = "pytest_cov-2.12.1-py2.py3-none-any.whl", hash = "sha256:261bb9e47e65bd099c89c3edf92972865210c36813f80ede5277dceb77a4a62a"},
 ]
 pytest-fixture-config = [
     {file = "pytest-fixture-config-1.7.0.tar.gz", hash = "sha256:41a17417721f6862ce6b40e3280fddd8e1659b2c306ec46b237d7021fec5218e"},
@@ -975,28 +976,44 @@ pytest-virtualenv = [
 regex = [
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+    {file = "regex-2020.10.28-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:c454ad88e56e80e44f824ef8366bb7e4c3def12999151fd5c0ea76a18fe9aa3e"},
     {file = "regex-2020.10.28-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:c8a2b7ccff330ae4c460aff36626f911f918555660cc28163417cb84ffb25789"},
     {file = "regex-2020.10.28-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:4afa350f162551cf402bfa3cd8302165c8e03e689c897d185f16a167328cc6dd"},
     {file = "regex-2020.10.28-cp36-cp36m-manylinux2010_i686.whl", hash = "sha256:b88fa3b8a3469f22b4f13d045d9bd3eda797aa4e406fde0a2644bc92bbdd4bdd"},
     {file = "regex-2020.10.28-cp36-cp36m-manylinux2010_x86_64.whl", hash = "sha256:f43109822df2d3faac7aad79613f5f02e4eab0fc8ad7932d2e70e2a83bd49c26"},
+    {file = "regex-2020.10.28-cp36-cp36m-manylinux2014_aarch64.whl", hash = "sha256:de7fd57765398d141949946c84f3590a68cf5887dac3fc52388df0639b01eda4"},
+    {file = "regex-2020.10.28-cp36-cp36m-manylinux2014_i686.whl", hash = "sha256:9b6305295b6591e45f069d3553c54d50cc47629eb5c218aac99e0f7fafbf90a1"},
+    {file = "regex-2020.10.28-cp36-cp36m-manylinux2014_x86_64.whl", hash = "sha256:bd904c0dec29bbd0769887a816657491721d5f545c29e30fd9d7a1a275dc80ab"},
     {file = "regex-2020.10.28-cp36-cp36m-win32.whl", hash = "sha256:8092a5a06ad9a7a247f2a76ace121183dc4e1a84c259cf9c2ce3bbb69fac3582"},
     {file = "regex-2020.10.28-cp36-cp36m-win_amd64.whl", hash = "sha256:49461446b783945597c4076aea3f49aee4b4ce922bd241e4fcf62a3e7c61794c"},
+    {file = "regex-2020.10.28-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:297116e79074ec2a2f885d22db00ce6e88b15f75162c5e8b38f66ea734e73c64"},
     {file = "regex-2020.10.28-cp37-cp37m-manylinux1_i686.whl", hash = "sha256:8ca9dca965bd86ea3631b975d63b0693566d3cc347e55786d5514988b6f5b84c"},
     {file = "regex-2020.10.28-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:ea37320877d56a7f0a1e6a625d892cf963aa7f570013499f5b8d5ab8402b5625"},
     {file = "regex-2020.10.28-cp37-cp37m-manylinux2010_i686.whl", hash = "sha256:3a5f08039eee9ea195a89e180c5762bfb55258bfb9abb61a20d3abee3b37fd12"},
     {file = "regex-2020.10.28-cp37-cp37m-manylinux2010_x86_64.whl", hash = "sha256:cb905f3d2e290a8b8f1579d3984f2cfa7c3a29cc7cba608540ceeed18513f520"},
+    {file = "regex-2020.10.28-cp37-cp37m-manylinux2014_aarch64.whl", hash = "sha256:96f99219dddb33e235a37283306834700b63170d7bb2a1ee17e41c6d589c8eb9"},
+    {file = "regex-2020.10.28-cp37-cp37m-manylinux2014_i686.whl", hash = "sha256:227a8d2e5282c2b8346e7f68aa759e0331a0b4a890b55a5cfbb28bd0261b84c0"},
+    {file = "regex-2020.10.28-cp37-cp37m-manylinux2014_x86_64.whl", hash = "sha256:2564def9ce0710d510b1fc7e5178ce2d20f75571f788b5197b3c8134c366f50c"},
     {file = "regex-2020.10.28-cp37-cp37m-win32.whl", hash = "sha256:a62162be05edf64f819925ea88d09d18b09bebf20971b363ce0c24e8b4aa14c0"},
     {file = "regex-2020.10.28-cp37-cp37m-win_amd64.whl", hash = "sha256:03855ee22980c3e4863dc84c42d6d2901133362db5daf4c36b710dd895d78f0a"},
+    {file = "regex-2020.10.28-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:bf4f896c42c63d1f22039ad57de2644c72587756c0cfb3cc3b7530cfe228277f"},
     {file = "regex-2020.10.28-cp38-cp38-manylinux1_i686.whl", hash = "sha256:625116aca6c4b57c56ea3d70369cacc4d62fead4930f8329d242e4fe7a58ce4b"},
     {file = "regex-2020.10.28-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:2dc522e25e57e88b4980d2bdd334825dbf6fa55f28a922fc3bfa60cc09e5ef53"},
     {file = "regex-2020.10.28-cp38-cp38-manylinux2010_i686.whl", hash = "sha256:119e0355dbdd4cf593b17f2fc5dbd4aec2b8899d0057e4957ba92f941f704bf5"},
     {file = "regex-2020.10.28-cp38-cp38-manylinux2010_x86_64.whl", hash = "sha256:cfcf28ed4ce9ced47b9b9670a4f0d3d3c0e4d4779ad4dadb1ad468b097f808aa"},
+    {file = "regex-2020.10.28-cp38-cp38-manylinux2014_aarch64.whl", hash = "sha256:b45bab9f224de276b7bc916f6306b86283f6aa8afe7ed4133423efb42015a898"},
+    {file = "regex-2020.10.28-cp38-cp38-manylinux2014_i686.whl", hash = "sha256:52e83a5f28acd621ba8e71c2b816f6541af7144b69cc5859d17da76c436a5427"},
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     {file = "regex-2020.10.28-cp38-cp38-win32.whl", hash = "sha256:06b52815d4ad38d6524666e0d50fe9173533c9cc145a5779b89733284e6f688f"},
     {file = "regex-2020.10.28-cp38-cp38-win_amd64.whl", hash = "sha256:c3466a84fce42c2016113101018a9981804097bacbab029c2d5b4fcb224b89de"},
+    {file = "regex-2020.10.28-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:127a9e0c0d91af572fbb9e56d00a504dbd4c65e574ddda3d45b55722462210de"},
     {file = "regex-2020.10.28-cp39-cp39-manylinux1_i686.whl", hash = "sha256:c2c6c56ee97485a127555c9595c069201b5161de9d05495fbe2132b5ac104786"},
     {file = "regex-2020.10.28-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:1ec66700a10e3c75f1f92cbde36cca0d3aaee4c73dfa26699495a3a30b09093c"},
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     {file = "regex-2020.10.28-cp39-cp39-win32.whl", hash = "sha256:832339223b9ce56b7b15168e691ae654d345ac1635eeb367ade9ecfe0e66bee0"},
     {file = "regex-2020.10.28-cp39-cp39-win_amd64.whl", hash = "sha256:654c1635f2313d0843028487db2191530bca45af61ca85d0b16555c399625b0e"},
     {file = "regex-2020.10.28.tar.gz", hash = "sha256:dd3e6547ecf842a29cf25123fbf8d2461c53c8d37aa20d87ecee130c89b7079b"},
diff --git a/pyproject.toml b/pyproject.toml
index 2fdbd5d..bb83ca2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ black = "^20.8b1"
 # tests
 pytest = "^6.1.2"
 pytest-asyncio = "^0.14.0"
-pytest-cov = "^2.8.1"
+pytest-cov = "^2.12.1"
 pytest-mock = "^3.3.1"
 pytest-virtualenv = "^1.7.0"
 requests = "^2.22.0"