diff --git a/COPYRIGHT b/COPYRIGHT
new file mode 100644
index 0000000..6b178ed
--- /dev/null
+++ b/COPYRIGHT
@@ -0,0 +1,14 @@
+Copyrights in the "sv-parser" library are retained by their contributors. No
+copyright assignment is required to contribute to the "sv-parser" library.
+
+The "sv-parser" library is licensed under either of
+
+ * Apache License, Version 2.0, (see ./LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license (see ./LICENSE-MIT or http://opensource.org/licenses/MIT)
+
+at your option.
+
+Unless you explicitly state otherwise, any contribution intentionally
+submitted for inclusion in the work by you, as defined in the Apache-2.0
+license, shall be dual licensed as above, without any additional terms or
+conditions.
diff --git a/README.md b/README.md
index 133e330..29c48f1 100644
--- a/README.md
+++ b/README.md
@@ -87,3 +87,19 @@ fn get_identifier(node: RefNode) -> Option<Locate> {
     }
 }
 ```
+
+## License
+
+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.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally
+submitted for inclusion in the work by you, as defined in the Apache-2.0
+license, shall be dual licensed as above, without any additional terms or
+conditions.