diff --git a/poetry.lock b/poetry.lock
index 1d47aeb8..5e9d5390 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -104,7 +104,7 @@ stevedore = ">=1.20.0"
 
 [[package]]
 name = "black"
-version = "21.6b0"
+version = "21.7b0"
 description = "The uncompromising code formatter."
 category = "dev"
 optional = false
@@ -116,7 +116,7 @@ click = ">=7.1.2"
 mypy-extensions = ">=0.4.3"
 pathspec = ">=0.8.1,<1"
 regex = ">=2020.1.8"
-toml = ">=0.10.1"
+tomli = ">=0.2.6,<2.0.0"
 
 [package.extras]
 colorama = ["colorama (>=0.4.3)"]
@@ -789,6 +789,14 @@ category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[[package]]
+name = "tomli"
+version = "1.0.4"
+description = "A lil' TOML parser"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
 [[package]]
 name = "typing-extensions"
 version = "3.7.4.3"
@@ -861,7 +869,7 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "caed57afb4640b6a22eeaa69eccbaaf1e42a08df809992f8cf5e1bb380c39c88"
+content-hash = "160b85289997e9410c1a8c0d8aad3b403a61ae4380101f5007d5b78fbdf76d33"
 
 [metadata.files]
 aiohttp = [
@@ -936,8 +944,8 @@ bandit = [
     {file = "bandit-1.7.0.tar.gz", hash = "sha256:8a4c7415254d75df8ff3c3b15cfe9042ecee628a1e40b44c15a98890fbfc2608"},
 ]
 black = [
-    {file = "black-21.6b0-py3-none-any.whl", hash = "sha256:dfb8c5a069012b2ab1e972e7b908f5fb42b6bbabcba0a788b86dc05067c7d9c7"},
-    {file = "black-21.6b0.tar.gz", hash = "sha256:dc132348a88d103016726fe360cb9ede02cecf99b76e3660ce6c596be132ce04"},
+    {file = "black-21.7b0-py3-none-any.whl", hash = "sha256:1c7aa6ada8ee864db745b22790a32f94b2795c253a75d6d9b5e439ff10d23116"},
+    {file = "black-21.7b0.tar.gz", hash = "sha256:c8373c6491de9362e39271630b65b964607bc5c79c83783547d76c839b3aa219"},
 ]
 blacken-docs = [
     {file = "blacken_docs-1.10.0-py2.py3-none-any.whl", hash = "sha256:149197a0b17e83121fc10aca9eda1417728fdccebde930a6722f97d87ed30f4b"},
@@ -1408,6 +1416,10 @@ toml = [
     {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
     {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
 ]
+tomli = [
+    {file = "tomli-1.0.4-py3-none-any.whl", hash = "sha256:0713b16ff91df8638a6a694e295c8159ab35ba93e3424a626dd5226d386057be"},
+    {file = "tomli-1.0.4.tar.gz", hash = "sha256:be670d0d8d7570fd0ea0113bd7bb1ba3ac6706b4de062cc4c952769355c9c268"},
+]
 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"},
diff --git a/pyproject.toml b/pyproject.toml
index 0ede43e8..cac52663 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ yarl = ">=1.6.0"
 
 [tool.poetry.dev-dependencies]
 aresponses = "^2.1.4"
-black = "^21.6b0"
+black = "^21.7b0"
 blacken-docs = "^1.10.0"
 coverage = {version = "^5.5", extras = ["toml"]}
 flake8 = "^3.9.1"