diff --git a/pyproject.toml b/pyproject.toml
index 8e7bf2a..0537ae1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,4 +35,6 @@ strict = true
 disallow_untyped_defs = true
 disallow_incomplete_defs = true
 ignore_missing_imports = true
+explicit_package_bases = true
+