diff --git a/poetry.lock b/poetry.lock
index 4422af00b05..b76673d12cf 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1062,7 +1062,7 @@ histogram = ["pygal", "pygaljs"]
 
 [[package]]
 name = "pytest-cov"
-version = "3.0.0"
+version = "4.0.0"
 description = "Pytest plugin for measuring coverage."
 category = "dev"
 optional = false
@@ -1383,7 +1383,7 @@ pydantic = ["pydantic", "email-validator"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6.2"
-content-hash = "30f28d43c9918fdbca446dbd5fc662fd3031d4d33c48e936634d1e1106dd9032"
+content-hash = "eb9a21ead51d3ab222004b0fecdb155ee63f6d78278e0d5c3331881413771ffe"
 
 [metadata.files]
 atomicwrites = [
@@ -1915,8 +1915,8 @@ pytest-benchmark = [
     {file = "pytest_benchmark-3.4.1-py2.py3-none-any.whl", hash = "sha256:36d2b08c4882f6f997fd3126a3d6dfd70f3249cde178ed8bbc0b73db7c20f809"},
 ]
 pytest-cov = [
-    {file = "pytest-cov-3.0.0.tar.gz", hash = "sha256:e7f0f5b1617d2210a2cabc266dfe2f4c75a8d32fb89eafb7ad9d06f6d076d470"},
-    {file = "pytest_cov-3.0.0-py3-none-any.whl", hash = "sha256:578d5d15ac4a25e5f961c938b85a05b09fdaae9deef3bb6de9a6e766622ca7a6"},
+    {file = "pytest-cov-4.0.0.tar.gz", hash = "sha256:996b79efde6433cdbd0088872dbc5fb3ed7fe1578b68cdbba634f14bb8dd0470"},
+    {file = "pytest_cov-4.0.0-py3-none-any.whl", hash = "sha256:2feb1b751d66a8bd934e5edfa2e961d11309dc37b73b0eabe73b5945fee20f6b"},
 ]
 pytest-forked = [
     {file = "pytest-forked-1.4.0.tar.gz", hash = "sha256:8b67587c8f98cbbadfdd804539ed5455b6ed03802203485dd2f53c1422d7440e"},
diff --git a/pyproject.toml b/pyproject.toml
index 6ac789ad445..3546b167ac4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ flake8-fixme = "^1.1.1"
 flake8-isort = "^4.1.2"
 flake8-variables-names = "^0.0.4"
 isort = "^5.10.1"
-pytest-cov = "^3.0.0"
+pytest-cov = "^4.0.0"
 pytest-mock = "^3.5.1"
 pdoc3 = "^0.10.0"
 pytest-asyncio = "^0.16.0"