diff --git a/pyproject.toml b/pyproject.toml
index 2395ca3..8ce7d06 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,6 +11,7 @@ authors     = [
     {name = "The mypy developers", email = "jukka.lehtosalo@iki.fi"}
 ]
 license     = "MIT"
+license-files = ["LICENSE"]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Environment :: Console",