diff --git a/poetry.lock b/poetry.lock
index 7c72acb14..9f4161dce 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -105,7 +105,7 @@ chardet = ">=3.0.2"
 
 [[package]]
 name = "black"
-version = "21.4b0"
+version = "21.4b2"
 description = "The uncompromising code formatter."
 category = "dev"
 optional = false
@@ -115,7 +115,7 @@ python-versions = ">=3.6.2"
 appdirs = "*"
 click = ">=7.1.2"
 mypy-extensions = ">=0.4.3"
-pathspec = ">=0.6,<1"
+pathspec = ">=0.8.1,<1"
 regex = ">=2020.1.8"
 toml = ">=0.10.1"
 
@@ -1352,7 +1352,7 @@ docs = ["myst-parser", "pygments", "sphinx", "sphinx-autodoc-typehints", "sphinx
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "f554bfcae1c01b00c930f946256944bf49dc9d3799dba759e1017ca71809b7c4"
+content-hash = "099fea822b670ebf08935d7b2cd2b5bac15c0e8071807885844ee64d61aace02"
 
 [metadata.files]
 alabaster = [
@@ -1396,8 +1396,8 @@ binaryornot = [
     {file = "binaryornot-0.4.4.tar.gz", hash = "sha256:359501dfc9d40632edc9fac890e19542db1a287bbcfa58175b66658392018061"},
 ]
 black = [
-    {file = "black-21.4b0-py3-none-any.whl", hash = "sha256:2db7040bbbbaa46247bfcc05c6efdebd7ebe50c1c3ca745ca6e0f6776438c96c"},
-    {file = "black-21.4b0.tar.gz", hash = "sha256:915d916c48646dbe8040d5265cff7111421a60a3dfe7f7e07273176a57c24a34"},
+    {file = "black-21.4b2-py3-none-any.whl", hash = "sha256:bff7067d8bc25eb21dcfdbc8c72f2baafd9ec6de4663241a52fb904b304d391f"},
+    {file = "black-21.4b2.tar.gz", hash = "sha256:fc9bcf3b482b05c1f35f6a882c079dc01b9c7795827532f4cc43c0ec88067bbc"},
 ]
 certifi = [
     {file = "certifi-2020.12.5-py2.py3-none-any.whl", hash = "sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830"},
diff --git a/pyproject.toml b/pyproject.toml
index 20c716231..9ee453f10 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -69,7 +69,7 @@ xdoctest = "^0.15.0"
 tox = "^3.21.4"
 # Code formatter
 # see: https://black.readthedocs.io/en/stable/editor_integration.html
-black = "^21.4b0"
+black = "^21.4b2"
 # Linters
 flakehell = "^0.9.0"
 pylint = "^2.8.2"