From 8ae45ca63d3b0fd2dda1cb72197cb3c170680c80 Mon Sep 17 00:00:00 2001
From: pyup-bot <github-bot@pyup.io>
Date: Sat, 9 Jan 2021 07:17:06 +0800
Subject: [PATCH] Update tox from 2.9.1 to 3.21.0

---
 requirements_dev.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/requirements_dev.txt b/requirements_dev.txt
index d6ad529..7be890b 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -2,7 +2,7 @@ pip==9.0.1
 wheel==0.30.0
 watchdog==0.8.3
 flake8==3.4.1
-tox==2.9.1
+tox==3.21.0
 coverage==4.4.1
 Sphinx==1.6.3
 PyYAML==3.12