diff --git a/setup.cfg b/setup.cfg
index e1de34c..22e18b8 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -63,7 +63,7 @@ dev =
     flake8-bugbear~=23.7.10
     flake8-docstrings~=1.7.0
     pep8-naming~=0.13.3
-    mypy~=1.5.1
+    mypy>=1.5.1,<1.12.0
     pydocstyle~=6.3.0
     coverage~=7.3.0
     pytest~=7.4.0