diff --git a/pyproject.toml b/pyproject.toml
index 7c9a4c72..3f5437dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -101,3 +101,4 @@ line_length = 80
 
 [tool.mypy]
 ignore_missing_imports = true
+explicit_package_bases = true