diff --git a/pyproject.toml b/pyproject.toml
index 1a08701..894326b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -65,6 +65,7 @@ exclude = '''
 profile = "black"
 
 [tool.mypy]
+mypy_path = "src/"
 show_error_codes = true
 disallow_untyped_defs = true
 disallow_untyped_calls = true