diff --git a/setup.py b/setup.py
index 1b9e96481..18fb3827c 100644
--- a/setup.py
+++ b/setup.py
@@ -94,7 +94,7 @@ setup(
             "pytest-xdist>=1.22,<2",
             "pytest>=3.3,<4",
             "requests>=2.9.1, <3",
-            "tox>=2.3, <3",
+            "tox>=3.0,<3.1",
             "rstcheck>=2.2, <4.0",
         ],
         'examples': [