diff --git a/pyproject.toml b/pyproject.toml
index af15fd3..11143b0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ package = true
 dev = [
     "check-manifest",
     "flit>=3.12,<4",
-    "mypy==2.1.0",  # https://github.com/python/mypy
+    "mypy==2.3.0",  # https://github.com/python/mypy
     "pre-commit>=4,<5",  # https://github.com/pre-commit/pre-commit
     "ruff>=0.12,<1.0",
     "twine>=6.2,<7.0",