diff --git a/pyproject.toml b/pyproject.toml
index 62ac50e..7a73b24 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ classifiers = [
 dev = [
     "jinja2>=3.1.6",
     "maturin>=1.8.3",
-    "mypy>=1.15.0",
+    "mypy>=1.20.1",
     "pytest>=9.0.3",
     "pytest-benchmark>=5.2.3",
     "pytest-cov>=6.0.0",