diff --git a/tox.ini b/tox.ini
index a321069..3708996 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,6 +19,7 @@ envlist=py3
 ignore = E126,E261,E302,E305,W504
 # Don't lint setup.py, the .tox virtualenv directory, or the build directory
 exclude = setup.py,.tox,build
+max-line-length = 100
 
 [mypy]
 mypy_path=src