diff --git a/poetry.lock b/poetry.lock
index c70e52a2..c9e6a86b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -17,14 +17,6 @@ yarl = ">=1.0,<2.0"
 [package.extras]
 speedups = ["aiodns", "brotlipy", "cchardet"]
 
-[[package]]
-name = "appdirs"
-version = "1.4.4"
-description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
-category = "dev"
-optional = false
-python-versions = "*"
-
 [[package]]
 name = "aresponses"
 version = "2.1.4"
@@ -116,23 +108,28 @@ stevedore = ">=1.20.0"
 
 [[package]]
 name = "black"
-version = "21.7b0"
+version = "21.8b0"
 description = "The uncompromising code formatter."
 category = "dev"
 optional = false
 python-versions = ">=3.6.2"
 
 [package.dependencies]
-appdirs = "*"
 click = ">=7.1.2"
 mypy-extensions = ">=0.4.3"
-pathspec = ">=0.8.1,<1"
+pathspec = ">=0.9.0,<1"
+platformdirs = ">=2"
 regex = ">=2020.1.8"
 tomli = ">=0.2.6,<2.0.0"
+typing-extensions = [
+    {version = ">=3.10.0.0", markers = "python_version < \"3.10\""},
+    {version = "!=3.10.0.1", markers = "python_version >= \"3.10\""},
+]
 
 [package.extras]
 colorama = ["colorama (>=0.4.3)"]
 d = ["aiohttp (>=3.6.0)", "aiohttp-cors (>=0.4.0)"]
+jupyter = ["ipython (>=7.8.0)", "tokenize-rt (>=3.2.0)"]
 python2 = ["typed-ast (>=1.4.2)"]
 uvloop = ["uvloop (>=0.15.2)"]
 
@@ -807,6 +804,14 @@ category = "dev"
 optional = false
 python-versions = ">=3.6"
 
+[[package]]
+name = "typing-extensions"
+version = "3.7.4.3"
+description = "Backported and Experimental Type Hints for Python 3.5+"
+category = "main"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "typing-extensions"
 version = "3.10.0.0"
@@ -893,7 +898,7 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "8dbaef6de34df8e5a466024fac1abd6f4ebf465e39223a32a5cd7cb56f186d77"
+content-hash = "80d509e6ea05e0d6e28f9133ba763547a12864ed4568c7565b31f00c529c17d9"
 
 [metadata.files]
 aiohttp = [
@@ -935,10 +940,6 @@ aiohttp = [
     {file = "aiohttp-3.7.4.post0-cp39-cp39-win_amd64.whl", hash = "sha256:02f46fc0e3c5ac58b80d4d56eb0a7c7d97fcef69ace9326289fb9f1955e65cfe"},
     {file = "aiohttp-3.7.4.post0.tar.gz", hash = "sha256:493d3299ebe5f5a7c66b9819eacdcfbbaaf1a8e84911ddffcdc48888497afecf"},
 ]
-appdirs = [
-    {file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
-    {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
-]
 aresponses = [
     {file = "aresponses-2.1.4-py3-none-any.whl", hash = "sha256:2a5a100c9b39e559bf55c26cc837a8ce64ab160ee086afa01ee9c4ef07f245db"},
     {file = "aresponses-2.1.4.tar.gz", hash = "sha256:39674af90700f1bfe2c7c9049cd8116f5c10d34d2e2427fd744b88d9e8644c94"},
@@ -972,8 +973,8 @@ bandit = [
     {file = "bandit-1.7.0.tar.gz", hash = "sha256:8a4c7415254d75df8ff3c3b15cfe9042ecee628a1e40b44c15a98890fbfc2608"},
 ]
 black = [
-    {file = "black-21.7b0-py3-none-any.whl", hash = "sha256:1c7aa6ada8ee864db745b22790a32f94b2795c253a75d6d9b5e439ff10d23116"},
-    {file = "black-21.7b0.tar.gz", hash = "sha256:c8373c6491de9362e39271630b65b964607bc5c79c83783547d76c839b3aa219"},
+    {file = "black-21.8b0-py3-none-any.whl", hash = "sha256:2a0f9a8c2b2a60dbcf1ccb058842fb22bdbbcb2f32c6cc02d9578f90b92ce8b7"},
+    {file = "black-21.8b0.tar.gz", hash = "sha256:570608d28aa3af1792b98c4a337dbac6367877b47b12b88ab42095cfc1a627c2"},
 ]
 blacken-docs = [
     {file = "blacken_docs-1.11.0-py2.py3-none-any.whl", hash = "sha256:9fcd6c11fd6e128fa25b0bbb30e6a054bf81e818ffdee4c6c2281a77e75696f0"},
@@ -1358,6 +1359,9 @@ tomli = [
     {file = "tomli-1.2.1.tar.gz", hash = "sha256:a5b75cb6f3968abb47af1b40c1819dc519ea82bcc065776a866e8d74c5ca9442"},
 ]
 typing-extensions = [
+    {file = "typing_extensions-3.7.4.3-py2-none-any.whl", hash = "sha256:dafc7639cde7f1b6e1acc0f457842a83e722ccca8eef5270af2d74792619a89f"},
+    {file = "typing_extensions-3.7.4.3-py3-none-any.whl", hash = "sha256:7cb407020f00f7bfc3cb3e7881628838e69d8f3fcab2f64742a5e76b2f841918"},
+    {file = "typing_extensions-3.7.4.3.tar.gz", hash = "sha256:99d4073b617d30288f569d3f13d2bd7548c3a7e4c8de87db09a9d29bb3a4a60c"},
     {file = "typing_extensions-3.10.0.0-py2-none-any.whl", hash = "sha256:0ac0f89795dd19de6b97debb0c6af1c70987fd80a2d62d1958f7e56fcc31b497"},
     {file = "typing_extensions-3.10.0.0-py3-none-any.whl", hash = "sha256:779383f6086d90c99ae41cf0ff39aac8a7937a9283ce0a414e5dd782f4c94a84"},
     {file = "typing_extensions-3.10.0.0.tar.gz", hash = "sha256:50b6f157849174217d0656f99dc82fe932884fb250826c18350e159ec6cdf342"},
diff --git a/pyproject.toml b/pyproject.toml
index e88d2ecb..d8021395 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ yarl = ">=1.6.0"
 
 [tool.poetry.dev-dependencies]
 aresponses = "^2.1.4"
-black = "^21.7b0"
+black = "^21.8b0"
 blacken-docs = "^1.11.0"
 flake8 = "^3.8.4"
 flake8-docstrings = "^1.5.0"