diff --git a/pyproject.toml b/pyproject.toml
index 53ea8ee..0ad00eb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-  "mypy>=1.15,<2",
+  "mypy>=1.15,<3",
   "pytest>=8.3,<9",
   "pytest-cov>=6,<7",
   "ruff>=0.11,<1",