diff --git a/pyproject.toml b/pyproject.toml
index 40189e1..5f96739 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "mypy>=0.991,<1.15",
+    "mypy>=0.991,<2.5",
     "types-setuptools==75.8.0.20250110",
 ]