diff --git a/pyproject.toml b/pyproject.toml
index 0d79969..2f0f347 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-  "mypy==1.19.1",
+  "mypy==1.20.0",
   "pre-commit==4.5.1",
   "ruff==0.15.8",
 ]