diff --git a/README.md b/README.md
index f0011d3..076eb99 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,5 @@ Licensed under either of
 
  * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
  * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.