1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index e12e28ffa..9a4e15cc6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-minversion = 2.0
+minversion = 2.5.0
 skipsdist = True
 envlist = pep8,py37,py36,py27,pypy