diff --git a/packages/core/pyproject.toml b/packages/core/pyproject.toml
index 7cd242f..b159804 100644
--- a/packages/core/pyproject.toml
+++ b/packages/core/pyproject.toml
@@ -14,7 +14,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-dev = ["pytest>=7.4", "pytest-asyncio>=0.23", "mypy>=1.8", "ruff>=0.3"]
+dev = ["pytest>=7.4", "pytest-asyncio>=0.23", "mypy>=1.20.1", "ruff>=0.3"]
 
 [build-system]
 requires = ["hatchling"]