diff --git a/misc/requirements/requirements-tox.txt b/misc/requirements/requirements-tox.txt
index 097859b6e..b6c9e9d6f 100644
--- a/misc/requirements/requirements-tox.txt
+++ b/misc/requirements/requirements-tox.txt
@@ -3,7 +3,7 @@
 filelock==3.0.10
 pluggy==0.8.0
 py==1.7.0
-six==1.11.0
+six==1.12.0
 toml==0.10.0
 tox==3.5.3
 virtualenv==16.1.0