diff --git a/tox.ini b/tox.ini
index 7d71a8116d..e6151e13a2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -40,7 +40,7 @@ deps = yamllint
 
 commands =
   yamllint -s {toxinidir}
-  flake8 {toxinidir}
+  flake8 --max-complexity 12 {toxinidir}
 
 [flake8]
 exclude = .git,.tox,tests/output