diff --git a/makefile b/makefile
index 899e17f..f68b135 100644
--- a/makefile
+++ b/makefile
@@ -1,4 +1,4 @@
-PYTHON_FILES=.
+PYTHON_FILES=./src
 lint:
 	poetry run ruff $(PYTHON_FILES)
 	poetry run mypy $(PYTHON_FILES)