diff --git a/pyproject.toml b/pyproject.toml
index 359d106..60c55b2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -92,7 +92,7 @@ dependencies = [
 ]
 optional-dependencies.develop = [
   "munch<5",
-  "mypy<1.19",
+  "mypy<1.20",
   "poethepoet<0.30",
   "pyproject-fmt<2.6",
   "ruff<0.14",