diff --git a/poetry.lock b/poetry.lock
index 536c107f..a4a2e18e 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -340,7 +340,7 @@ python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "tox"
-version = "3.21.0"
+version = "3.21.1"
 description = "tox is a generic virtualenv management and test command line tool"
 category = "dev"
 optional = false
@@ -628,8 +628,8 @@ toml = [
     {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
 ]
 tox = [
-    {file = "tox-3.21.0-py2.py3-none-any.whl", hash = "sha256:5efda30ad73e662c3844ac51ce1381bf28f61063773e06996aa8b6277133a7c0"},
-    {file = "tox-3.21.0.tar.gz", hash = "sha256:8cccede64802e78aa6c69f81051b25f0706639d1cbbb34d9366ce00c70ee054f"},
+    {file = "tox-3.21.1-py2.py3-none-any.whl", hash = "sha256:8a28facf65275c84b3bfde102afe24541d2ce02fd83ea07ce906537c3a74ed2d"},
+    {file = "tox-3.21.1.tar.gz", hash = "sha256:31379f2662393034203c5d6b2ebb7b86c67452cfc689784475c1c6e4a3cbc0cd"},
 ]
 typed-ast = [
     {file = "typed_ast-1.4.1-cp35-cp35m-manylinux1_i686.whl", hash = "sha256:73d785a950fc82dd2a25897d525d003f6378d1cb23ab305578394694202a58c3"},