diff --git a/requirements_test.txt b/requirements_test.txt
index 1383e310..c3e69148 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,6 +1,6 @@
 pytest==4.4.2
 pytest-timeout==1.3.3
-tox==3.9.0
+tox==3.12.1
 flake8==3.7.7
 flake8-commas==2.0.0
 flake8-comprehensions==2.1.0