diff --git a/pyproject.toml b/pyproject.toml
index 703b90d..03dadd4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -88,7 +88,7 @@ dependencies = [
 ]
 optional-dependencies.develop = [
   "black<26",
-  "mypy<1.20",
+  "mypy<2.2",
   "poethepoet<1",
   "pyproject-fmt<3",
   "ruff<0.16",