diff --git a/setup.cfg b/setup.cfg
index 888ad6ed4a0ffab657235e132de84a7c3b9034b1..abb649958ebedbd6fef86cfc9d2ba47dca8f21b2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -16,3 +16,6 @@ ignore =
     docs/*
     pylint.cfg
     tox.ini
+
+[flake8]
+max-line-length = 90