diff --git a/Makefile b/Makefile
index 382acbd..2861ada 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ SHELL=/bin/bash
 
 lint:
 	ruff $$(dirname */__init__.py)
-	mypy --install-types --non-interactive --check-untyped-defs $$(dirname */__init__.py)
+	mypy --install-types --non-interactive $$(dirname */__init__.py)
 
 test:
 	python ./test/test.py -v
diff --git a/pyproject.toml b/pyproject.toml
index f76dfb4..a59e386 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,6 +10,13 @@ skip_gitignore = true
 line-length = 120
 per-file-ignores = {"yq/__init__.py" = ["F401"]}
 
+[tool.mypy]
+files = [
+  "yq"
+]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+
 [[tool.mypy.overrides]]
 module = "argcomplete.*"
 ignore_missing_imports = true