diff --git a/pyproject.toml b/pyproject.toml
index 7723212..f14c060 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ gui = ["matplotlib>=3.8,<4"]
 dev = [
   "build==1.5.0",
   "matplotlib>=3.8,<4",
-  "mypy>=1.15,<2",
+  "mypy>=1.15,<3",
   "pip-audit>=2.9,<3",
   "pytest>=8.3,<10",
   "ruff>=0.11,<0.18",