diff --git a/poetry.lock b/poetry.lock
index 7bb540e239abc8f312d4cccfc780685f66d7045b..83f62636bf6578db17d5d788c3833a7693af1937 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -936,7 +936,7 @@ python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "tox"
-version = "3.21.4"
+version = "3.22.0"
 description = "tox is a generic virtualenv management and test command line tool"
 category = "dev"
 optional = false
@@ -1029,7 +1029,7 @@ testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6"
-content-hash = "679902e509b4fbb6ab7b3c26a3a32703cd8912c4f0d3c2b048a4920594fed60e"
+content-hash = "b69fd60321551dd152146d247b900a68852be377a91bfd431e3c3462b6541710"
 
 [metadata.files]
 alabaster = [
@@ -1559,8 +1559,8 @@ toml = [
     {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
 ]
 tox = [
-    {file = "tox-3.21.4-py2.py3-none-any.whl", hash = "sha256:65d0e90ceb816638a50d64f4b47b11da767b284c0addda2294cb3cd69bd72425"},
-    {file = "tox-3.21.4.tar.gz", hash = "sha256:cf7fef81a3a2434df4d7af2a6d1bf606d2970220addfbe7dea2615bd4bb2c252"},
+    {file = "tox-3.22.0-py2.py3-none-any.whl", hash = "sha256:89afa9c59c04beb55eda789c7a65feb1a70fde117f85f1bd1c27c66758456e60"},
+    {file = "tox-3.22.0.tar.gz", hash = "sha256:ed1e650cf6368bcbc4a071eeeba363c480920e0ed8a9ad1793c7caaa5ad33d49"},
 ]
 typed-ast = [
     {file = "typed_ast-1.4.2-cp35-cp35m-manylinux1_i686.whl", hash = "sha256:7703620125e4fb79b64aa52427ec192822e9f45d37d4b6625ab37ef403e1df70"},
diff --git a/pyproject.toml b/pyproject.toml
index fc26005a44a5abfefa563eb9c62a5bb4ad012581..d022b6f50698d01394b8f37f01b682afc9c72bdd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ isort = "^5.0.0"
 flake8-isort = "^4.0.0"
 pytest-cov = "^2.8.1"
 pytest-sugar = "^0.9.2"
-tox = "^3.21.4"
+tox = "^3.22.0"
 
 [tool.black]
 line-length = 100