diff --git a/pyproject.toml b/pyproject.toml
index 0069524..72ece9c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ dev = [
     # Code quality
     "black>=23.0.0",
     "flake8>=6.0.0",
-    "mypy>=1.0.0",
+    "mypy>=1.20.0",
     # Development utilities
     "pre-commit>=3.0.0",
     # ComfyUI testing (mock dependencies for unit tests)