diff --git a/pyproject.toml b/pyproject.toml
index 52c5f10..b591ecd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = [
 [project.optional-dependencies]
 serve = ["uvicorn>=0.49.0"]
 llm = ["anthropic>=0.40"]
-dev = ["pytest>=9.1.0", "pytest-cov>=5.0", "hypothesis>=6.0", "httpx>=0.28.1", "ruff>=0.5", "mypy>=1.8", "types-jsonschema>=4.26.0.20260518"]
+dev = ["pytest>=9.1.0", "pytest-cov>=5.0", "hypothesis>=6.0", "httpx>=0.28.1", "ruff>=0.5", "mypy>=2.1.0", "types-jsonschema>=4.26.0.20260518"]
 
 [project.scripts]
 finalizer100 = "tools.finalizer100:main"