diff --git a/tox.ini b/tox.ini
index 887183f2..5aa755d4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -88,7 +88,7 @@ commands =
 envdir = {toxworkdir}/lint
 deps =
     pycodestyle>=2.11.0
-    mypy>=1.8.0
+    mypy>=1.8.0,<1.12
 commands =
     pycodestyle --ignore=E402,W503,W504 --exclude=_version.py --max-line-length=88 efel tests
     mypy efel tests  --ignore-missing-imports