diff --git a/pyproject.toml b/pyproject.toml
index 71ec2e6..73ed500 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ dynamic = ["version"]
 dev = [
   "maturin~=1.0",
   "pre-commit~=4.3",
-  "mypy~=1.19.0",
+  "mypy~=1.20.0",
   "pytest~=9.0",
   "pandas[excel]>=2.2",
 ]