diff --git a/tox.ini b/tox.ini
index 564558e..0018649 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,7 +23,7 @@ commands = flake8
 commands = {posargs}
 
 [flake8]
-ignore =
+max-line-length = 100
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 show-source = True