diff --git a/requirements.txt b/requirements.txt
index f84bac09..4f1305c5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ ipython==6.1.0
 flake8==3.4.1
 -e .[sa]
 sphinx==1.6.3
-tox==2.7.0
+tox==2.8.1
 pytest==3.2.1
 pytest-cov==2.5.1
 pytest-sugar==0.9.0