diff --git a/pyproject.toml b/pyproject.toml
index 04823e68..f771c251 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,7 @@ dependencies = [
   "tomli; python_version<'3.11'",
 ]
 optional-dependencies.dev = [
-  "mypy==2.1",
+  "mypy==2.3",
   "tomli",     # Needed even on 3.11+ for typechecking with mypy
   "tox",
 ]