diff --git a/poetry.lock b/poetry.lock
index 9a6ea94..fb4c4b6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -194,6 +194,9 @@ 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"]
 
@@ -901,18 +904,18 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xm
 
 [[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 = "pytest-randomly"
@@ -1351,7 +1354,7 @@ python-versions = "*"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "1a8e7e4fb91b4058d8e3c6292b092fd50f7963fea646172c45bcfe4749ef4b6c"
+content-hash = "5b67af3de9fadd3275be421a1464578aae2868948a251b394632df8184c81f78"
 
 [metadata.files]
 alabaster = [
@@ -1810,8 +1813,8 @@ pytest = [
     {file = "pytest-6.2.2.tar.gz", hash = "sha256:9d1edf9e7d0b84d72ea3dbcdfd22b35fb543a5e8f2a60092dd578936bf63d7f9"},
 ]
 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"},
 ]
 pytest-randomly = [
     {file = "pytest-randomly-3.5.0.tar.gz", hash = "sha256:440cec143fd9b0adeb072006c71e0294402a2bc2ccd08079c2341087ba4cf2d1"},
diff --git a/pyproject.toml b/pyproject.toml
index b433f89..80a979c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ nitpick = "^0.25"
 safety = "^1.9"
 
 pytest = "^6.1"
-pytest-cov = "^2.10"
+pytest-cov = "^3.0"
 pytest-randomly = "^3.4"
 coverage = "^5.5"