diff --git a/tox.ini b/tox.ini
index e4424a3..9ea64cf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -102,3 +102,4 @@ ignore = D203
 # across multiple lines. Presently it cannot be specified across multiple lines.
 # :-(
 exclude = .git,__pycache__,docs/source/conf.py
+max-complexity = 10