diff --git a/poetry.lock b/poetry.lock
index 39395ef..21cfbc5 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -101,6 +101,9 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
 
+[package.dependencies]
+toml = {version = "*", optional = true, markers = "extra == \"toml\""}
+
 [package.extras]
 toml = ["toml"]
 
@@ -367,14 +370,14 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xm
 
 [[package]]
 name = "pytest-cov"
-version = "2.11.1"
+version = "2.12.0"
 description = "Pytest plugin for measuring coverage."
 category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
-coverage = ">=5.2.1"
+coverage = {version = ">=5.2.1", extras = ["toml"]}
 pytest = ">=4.6"
 
 [package.extras]
@@ -428,7 +431,7 @@ name = "pyyaml"
 version = "5.3.1"
 description = "YAML parser and emitter for Python"
 category = "dev"
-optional = false
+optional = true
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
@@ -703,7 +706,7 @@ travis-ci = []
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6"
-content-hash = "a18078e1b4a0363f1c0171e88d27f24b80e5a9e8d460836525b282702be6458f"
+content-hash = "87eb420fca5fe3571a8b3d525c7eddda0d11ef9d0f563564bb8be27ba9ffe773"
 
 [metadata.files]
 alabaster = [
@@ -927,8 +930,8 @@ pytest = [
     {file = "pytest-6.2.3.tar.gz", hash = "sha256:671238a46e4df0f3498d1c3270e5deb9b32d25134c99b7d75370a68cfbe9b634"},
 ]
 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-2.12.0.tar.gz", hash = "sha256:8535764137fecce504a49c2b742288e3d34bc09eed298ad65963616cc98fd45e"},
+    {file = "pytest_cov-2.12.0-py2.py3-none-any.whl", hash = "sha256:95d4933dcbbacfa377bb60b29801daa30d90c33981ab2a79e9ab4452c165066e"},
 ]
 pytest-flake8 = [
     {file = "pytest-flake8-1.0.7.tar.gz", hash = "sha256:f0259761a903563f33d6f099914afef339c085085e643bee8343eb323b32dd6b"},
diff --git a/pyproject.toml b/pyproject.toml
index 7a5815f..80db0b7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ arrow = ">=0.12.1,<0.17.0"
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2"
-pytest-cov = "^2.11"
+pytest-cov = "^2.12"
 pytest-flake8 = "^1.0"
 responses = "^0.10.15"
 pytest-runner = "^5.3"