diff --git a/tox.ini b/tox.ini
index 99c5c5c..c92d3c9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,7 +33,7 @@ install_command = pip install {opts} {packages}
 # type checking on the world - just on ourselves.
 deps =
   flake8
-  mypy<0.740
+  mypy<0.790
 commands =
   flake8 {posargs}
   mypy --ignore-missing-imports zuulclient