diff --git a/requirements/requirements-test.txt b/requirements/requirements-test.txt
index 3c5e988..20609d2 100644
--- a/requirements/requirements-test.txt
+++ b/requirements/requirements-test.txt
@@ -11,7 +11,7 @@ nose-exclude==0.5.0
 pylint==1.7.2
 pytest==3.2.2
 six==1.11.0
-tox==2.8.2
+tox==2.9.1
 vulture==0.26
 radon==2.1.1
 sphinx==1.6.3