diff --git a/pyproject.toml b/pyproject.toml
index 7d48819..942b51b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ dev = [
     "pytest-mock>=3.15.0",
     "pytest-xdist>=3.8.0",
     "flake8>=7.3.0",
-    "mypy>=1.19.0",
+    "mypy>=1.20.1",
     "bandit>=1.9.0",
     "black>=25.11.0",
     "isort>=7.0.0",