diff --git a/pyproject.toml b/pyproject.toml
index 69f46ede..5b77ad69 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ packages = ["alignment"]
 [project.optional-dependencies]
 dev = [
     "ruff",
-    "mypy>=1.0,<1.17",
+    "mypy>=1.0,<1.19",
     "black>=23.1,<24.0",
     "isort>=5.12,<6.1",
     "pytest",