diff --git a/tox.ini b/tox.ini
index c51e8548..d65ced61 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,6 +5,11 @@ envlist =
     py37-test
     lint
 
+[flake8]
+max-line-length= 100
+exclude=
+ignore=
+
 [testenv]
 deps =
 passenv = CI TRAVIS TRAVIS_*