diff --git a/poetry.lock b/poetry.lock
index 1ea5c16..a089381 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1496,20 +1496,19 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.
 
 [[package]]
 name = "pytest-cov"
-version = "2.12.1"
+version = "4.0.0"
 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"
 files = [
-    {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"},
+    {file = "pytest-cov-4.0.0.tar.gz", hash = "sha256:996b79efde6433cdbd0088872dbc5fb3ed7fe1578b68cdbba634f14bb8dd0470"},
+    {file = "pytest_cov-4.0.0-py3-none-any.whl", hash = "sha256:2feb1b751d66a8bd934e5edfa2e961d11309dc37b73b0eabe73b5945fee20f6b"},
 ]
 
 [package.dependencies]
-coverage = ">=5.2.1"
+coverage = {version = ">=5.2.1", extras = ["toml"]}
 pytest = ">=4.6"
-toml = "*"
 
 [package.extras]
 testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtualenv"]
@@ -2729,4 +2728,4 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8, <3.11"
-content-hash = "5a27ce861d8f5acb14969f8063c4c1f46da58f37601e9680313d9eb860a90f11"
+content-hash = "42b60499ef57f86d8eb01d083eb1a4cf8ea2ada6b192aa7db44cfe0422a79642"
diff --git a/pyproject.toml b/pyproject.toml
index f7685d7..0acb00b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -58,7 +58,7 @@ sphinx-rtd-dark-mode = ">=1.2.3"
 Jinja2 = ">=3.0.1"
 mypy = ">=0.910"
 pyupgrade = ">=2.31.0"
-pytest-cov = "^2.8.1"
+pytest-cov = "^4.0.0"
 
 [tool.poetry.scripts]
 prosit_grpc = "prosit_grpc.__main__:main"