diff --git a/poetry.lock b/poetry.lock
index 328d9c3..f94b300 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -8,15 +8,16 @@ python-versions = "*"
 
 [[package]]
 name = "astroid"
-version = "2.5.2"
+version = "2.6.6"
 description = "An abstract syntax tree for Python with inference support."
 category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = "~=3.6"
 
 [package.dependencies]
 lazy-object-proxy = ">=1.4.0"
 typed-ast = {version = ">=1.4.0,<1.5", markers = "implementation_name == \"cpython\" and python_version < \"3.8\""}
+typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 wrapt = ">=1.11,<1.13"
 
 [[package]]
@@ -460,22 +461,19 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pylint"
-version = "2.7.4"
+version = "2.9.6"
 description = "python code static checker"
 category = "dev"
 optional = false
 python-versions = "~=3.6"
 
 [package.dependencies]
-astroid = ">=2.5.2,<2.7"
+astroid = ">=2.6.5,<2.7"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
 isort = ">=4.2.5,<6"
 mccabe = ">=0.6,<0.7"
 toml = ">=0.7.1"
 
-[package.extras]
-docs = ["sphinx (==3.5.1)", "python-docs-theme (==2020.12)"]
-
 [[package]]
 name = "pyparsing"
 version = "2.4.7"
@@ -695,7 +693,7 @@ testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6.1"
-content-hash = "7a779485f1f713e8f386d747363e4c85d46b43d55894f00c6a60b5ec34739d7e"
+content-hash = "31a0abd993c8dcfe3d8dc84d139588e83373025d4a671047e6a16aecfb5dd491"
 
 [metadata.files]
 appdirs = [
@@ -703,8 +701,8 @@ appdirs = [
     {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
 ]
 astroid = [
-    {file = "astroid-2.5.2-py3-none-any.whl", hash = "sha256:cd80bf957c49765dce6d92c43163ff9d2abc43132ce64d4b1b47717c6d2522df"},
-    {file = "astroid-2.5.2.tar.gz", hash = "sha256:6b0ed1af831570e500e2437625979eaa3b36011f66ddfc4ce930128610258ca9"},
+    {file = "astroid-2.6.6-py3-none-any.whl", hash = "sha256:ab7f36e8a78b8e54a62028ba6beef7561db4cdb6f2a5009ecc44a6f42b5697ef"},
+    {file = "astroid-2.6.6.tar.gz", hash = "sha256:3975a0bd5373bdce166e60c851cfcbaf21ee96de80ec518c1f4cb3e94c3fb334"},
 ]
 atomicwrites = [
     {file = "atomicwrites-1.4.0-py2.py3-none-any.whl", hash = "sha256:6d1784dea7c0c8d4a5172b6c620f40b6e4cbfdf96d783691f2e1302a7b88e197"},
@@ -930,8 +928,8 @@ pyflakes = [
     {file = "pyflakes-2.3.1.tar.gz", hash = "sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db"},
 ]
 pylint = [
-    {file = "pylint-2.7.4-py3-none-any.whl", hash = "sha256:209d712ec870a0182df034ae19f347e725c1e615b2269519ab58a35b3fcbbe7a"},
-    {file = "pylint-2.7.4.tar.gz", hash = "sha256:bd38914c7731cdc518634a8d3c5585951302b6e2b6de60fbb3f7a0220e21eeee"},
+    {file = "pylint-2.9.6-py3-none-any.whl", hash = "sha256:2e1a0eb2e8ab41d6b5dbada87f066492bb1557b12b76c47c2ee8aa8a11186594"},
+    {file = "pylint-2.9.6.tar.gz", hash = "sha256:8b838c8983ee1904b2de66cce9d0b96649a91901350e956d78f289c3bc87b48e"},
 ]
 pyparsing = [
     {file = "pyparsing-2.4.7-py2.py3-none-any.whl", hash = "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"},
diff --git a/pyproject.toml b/pyproject.toml
index 289b664..1e328b1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ flake8 = "^3.9.0"
 flake8-bandit = "^2.1.2"
 flake8-bugbear = "^21.4.3"
 placebo = "^0.9.0"
-pylint = "^2.7.4"
+pylint = "^2.9.6"
 pytest-black = "^0.3.12"
 pytest-cov = "^2.11.1"
 pytest-datadir = "^1.3.1"