diff --git a/poetry.lock b/poetry.lock
index 4e3e209..e741f4e 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -214,16 +214,17 @@ python-versions = "*"
 
 [[package]]
 name = "isort"
-version = "5.8.0"
+version = "5.9.0"
 description = "A Python utility / library to sort Python imports."
 category = "dev"
 optional = false
-python-versions = ">=3.6,<4.0"
+python-versions = ">=3.6.1,<4.0"
 
 [package.extras]
 pipfile_deprecated_finder = ["pipreqs", "requirementslib"]
 requirements_deprecated_finder = ["pipreqs", "pip-api"]
 colors = ["colorama (>=0.4.3,<0.5.0)"]
+plugins = ["setuptools"]
 
 [[package]]
 name = "mccabe"
@@ -519,7 +520,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pyt
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6.1"
-content-hash = "74c1372394b150f7633c31f62c841e1f2e0fec8ae94493fc84550859fa019e25"
+content-hash = "a55eadae4d057f3218cf87412e38d26d4a23147ac9d682d1a923365be996130e"
 
 [metadata.files]
 appdirs = [
@@ -648,8 +649,8 @@ iniconfig = [
     {file = "iniconfig-1.1.1.tar.gz", hash = "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"},
 ]
 isort = [
-    {file = "isort-5.8.0-py3-none-any.whl", hash = "sha256:2bb1680aad211e3c9944dbce1d4ba09a989f04e238296c87fe2139faa26d655d"},
-    {file = "isort-5.8.0.tar.gz", hash = "sha256:0a943902919f65c5684ac4e0154b1ad4fac6dcaa5d9f3426b732f1c8b5419be6"},
+    {file = "isort-5.9.0-py3-none-any.whl", hash = "sha256:e6b6111242682a9082738d0ba71a48ba5db0fa6fdabb169db9de13b48ad51840"},
+    {file = "isort-5.9.0.tar.gz", hash = "sha256:8fd40deb804e5ce21dbbb92d0a9a79907209a0f2ba42be571c2963499c0d4829"},
 ]
 mccabe = [
     {file = "mccabe-0.6.1-py2.py3-none-any.whl", hash = "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42"},
diff --git a/pyproject.toml b/pyproject.toml
index e0910ce..e84ea8d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ tox = "^3.23.0"
 pytest = "^6.2.3"
 mypy = "^0.812"
 black = "^20.8b1"
-isort = "^5.8.0"
+isort = "^5.9.0"
 toml = "^0.10.2"
 
 [build-system]