diff --git a/pyproject.toml b/pyproject.toml
index 1fa9848d..2f25341f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ actions = [
 ]
 dev = [
     "flit >=3.2.0,<4.0.0",
-    "mypy >=1.0.0,<1.9",
+    "mypy >=1.0.0,<1.10",
     "pip-audit >=2.4.4,<3.0.0",
     "pylint >=3.0.0,<3.1.0",
     "perflint >=0.8.0,<1.0.0",