diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c1b6673..b3ff0bb 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -21,3 +21,11 @@ npm test
 ## Commit style
 
 Use conventional commits such as `feat:`, `fix:`, `docs:`, `test:`, and `chore:`.
+
+## Licensing of contributions
+
+Unless you explicitly state otherwise, any contribution you intentionally
+submit for inclusion in this project shall be licensed under the MIT
+License (see the LICENSE file), without any additional terms or
+conditions, and you confirm that you have the right to submit it under
+that license.