diff --git a/poetry.lock b/poetry.lock
index c217b98..a42d7bb 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -379,18 +379,18 @@ testing = ["coverage", "hypothesis (>=5.7.1)"]
 
 [[package]]
 name = "pytest-cov"
-version = "2.11.1"
+version = "3.0.0"
 description = "Pytest plugin for measuring coverage."
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=3.6"
 
 [package.dependencies]
-coverage = ">=5.2.1"
+coverage = {version = ">=5.2.1", extras = ["toml"]}
 pytest = ">=4.6"
 
 [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 = "pyyaml"
@@ -510,7 +510,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pyt
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "26fee507bafce2854af5ef0d5a4173482409dfb82be4c19ac8c190e31a0e5d9d"
+content-hash = "aa80168618a603faf826f899ec17341a853595397ffc42c0b511928f1f3b1450"
 
 [metadata.files]
 aiohttp = [
@@ -773,8 +773,8 @@ pytest-asyncio = [
     {file = "pytest_asyncio-0.15.1-py3-none-any.whl", hash = "sha256:3042bcdf1c5d978f6b74d96a151c4cfb9dcece65006198389ccd7e6c60eb1eea"},
 ]
 pytest-cov = [
-    {file = "pytest-cov-2.11.1.tar.gz", hash = "sha256:359952d9d39b9f822d9d29324483e7ba04a3a17dd7d05aa6beb7ea01e359e5f7"},
-    {file = "pytest_cov-2.11.1-py2.py3-none-any.whl", hash = "sha256:bdb9fdb0b85a7cc825269a4c56b48ccaa5c7e365054b6038772c32ddcdc969da"},
+    {file = "pytest-cov-3.0.0.tar.gz", hash = "sha256:e7f0f5b1617d2210a2cabc266dfe2f4c75a8d32fb89eafb7ad9d06f6d076d470"},
+    {file = "pytest_cov-3.0.0-py3-none-any.whl", hash = "sha256:578d5d15ac4a25e5f961c938b85a05b09fdaae9deef3bb6de9a6e766622ca7a6"},
 ]
 pyyaml = [
     {file = "PyYAML-5.4.1-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:3b2b1824fe7112845700f815ff6a489360226a5609b96ec2190a45e62a9fc922"},
diff --git a/pyproject.toml b/pyproject.toml
index 503cd2d..dc17c15 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ tox = "^3.20"
 pytest = "^6.0"
 aioresponses = "^0.7"
 pytest-asyncio = "^0.15"
-pytest-cov = "^2.10"
+pytest-cov = "^3.0"
 
 [tool.tox]
 legacy_tox_ini = """