diff --git a/specs/simple-serialize.md b/specs/simple-serialize.md
index e7df673a8..9e29558d7 100644
--- a/specs/simple-serialize.md
+++ b/specs/simple-serialize.md
@@ -457,3 +457,7 @@ return hash(b''.join([tree_hash(getattr(x, field)) for field in sorted(value.fie
 |    Nim   | [ https://github.com/status-im/nim-beacon-chain/blob/master/beacon_chain/ssz.nim ](https://github.com/status-im/nim-beacon-chain/blob/master/beacon_chain/ssz.nim) | Nim Implementation maintained SSZ.                       |
 |   Rust   | [ https://github.com/paritytech/shasper/tree/master/util/ssz ](https://github.com/paritytech/shasper/tree/master/util/ssz)                                         | Shasper implementation of SSZ maintained by ParityTech.  |
 |   Javascript   | [ https://github.com/ChainSafeSystems/ssz-js/blob/master/src/index.js ](https://github.com/ChainSafeSystems/ssz-js/blob/master/src/index.js)                                         | Javascript Implementation maintained SSZ |
+
+
+## Copyright
+Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).