diff --git a/poetry.lock b/poetry.lock
index 522e9f6b..b5bff00d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -22,7 +22,7 @@ tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>
 
 [[package]]
 name = "black"
-version = "21.8b0"
+version = "21.9b0"
 description = "The uncompromising code formatter."
 category = "dev"
 optional = false
@@ -261,14 +261,6 @@ category = "dev"
 optional = false
 python-versions = ">=3.6"
 
-[[package]]
-name = "typing-extensions"
-version = "3.10.0.1"
-description = "Backported and Experimental Type Hints for Python 3.5+"
-category = "dev"
-optional = false
-python-versions = "*"
-
 [[package]]
 name = "typing-extensions"
 version = "3.10.0.2"
@@ -292,7 +284,7 @@ pyyaml = "*"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "f6f2f31e1b0fd61ce1f3c79004496d3071639476227737a8680be531825b0149"
+content-hash = "8d0623bba7864cb33184c0a9952646a50c94fa8b8ce6ea2fedb4489d25041223"
 
 [metadata.files]
 atomicwrites = [
@@ -304,8 +296,8 @@ attrs = [
     {file = "attrs-21.2.0.tar.gz", hash = "sha256:ef6aaac3ca6cd92904cdd0d83f629a15f18053ec84e6432106f7a4d04ae4f5fb"},
 ]
 black = [
-    {file = "black-21.8b0-py3-none-any.whl", hash = "sha256:2a0f9a8c2b2a60dbcf1ccb058842fb22bdbbcb2f32c6cc02d9578f90b92ce8b7"},
-    {file = "black-21.8b0.tar.gz", hash = "sha256:570608d28aa3af1792b98c4a337dbac6367877b47b12b88ab42095cfc1a627c2"},
+    {file = "black-21.9b0-py3-none-any.whl", hash = "sha256:380f1b5da05e5a1429225676655dddb96f5ae8c75bdf91e53d798871b902a115"},
+    {file = "black-21.9b0.tar.gz", hash = "sha256:7de4cfc7eb6b710de325712d40125689101d21d25283eed7e9998722cf10eb91"},
 ]
 click = [
     {file = "click-8.0.1-py3-none-any.whl", hash = "sha256:fba402a4a47334742d782209a7c79bc448911afe1149d07bdabdf480b3e2f4b6"},
@@ -479,9 +471,6 @@ tomli = [
     {file = "tomli-1.0.4.tar.gz", hash = "sha256:be670d0d8d7570fd0ea0113bd7bb1ba3ac6706b4de062cc4c952769355c9c268"},
 ]
 typing-extensions = [
-    {file = "typing_extensions-3.10.0.1-py2-none-any.whl", hash = "sha256:8bbffbd37fbeb9747a0241fdfde5ae99d4531ad1d1a41ccaea62100e15a5814c"},
-    {file = "typing_extensions-3.10.0.1-py3-none-any.whl", hash = "sha256:045dd532231acfa03628df5e0c66dba64e2cc8fc8b844538d4ad6d5dd6cb82dc"},
-    {file = "typing_extensions-3.10.0.1.tar.gz", hash = "sha256:83af6730a045fda60f46510f7f1f094776d90321caa4d97d20ef38871bef4bd3"},
     {file = "typing_extensions-3.10.0.2-py2-none-any.whl", hash = "sha256:d8226d10bc02a29bcc81df19a26e56a9647f8b0a6d4a83924139f4a8b01f17b7"},
     {file = "typing_extensions-3.10.0.2-py3-none-any.whl", hash = "sha256:f1d25edafde516b146ecd0613dabcc61409817af4766fbbcfb8d1ad4ec441a34"},
     {file = "typing_extensions-3.10.0.2.tar.gz", hash = "sha256:49f75d16ff11f1cd258e1b988ccff82a3ca5570217d7ad8c5f48205dd99a677e"},
diff --git a/pyproject.toml b/pyproject.toml
index a6039524..8a79f8f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ python = "^3.9"
 [tool.poetry.dev-dependencies]
 pytest = "^6.2.5"
 invoke = "^1.5.0"
-black = "^21.8b0"
+black = "^21.9b0"
 flake8 = "^3.9.2"
 pep8-naming = "^0.12.1"
 yamllint = "^1.26.3"