diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -316,6 +316,7 @@ encryption library providing MD5, SHA1, SHA2 hashing and HMAC functionality, as
 ### Rust
 
 - [octavo](https://github.com/libOctavo/octavo) - Highly modular & configurable hash & crypto library.
+- [proteus](https://github.com/wireapp/proteus) - Axolotl protocol implementation, without header keys, in Rust.
 - [ring](https://github.com/briansmith/ring) - Safe, fast, small crypto using Rust & BoringSSL's cryptography primitives.
 - [rust-crypto](https://github.com/DaGenix/rust-crypto) - Mostly pure-Rust implementation of various cryptographic algorithms.
 - [rust-openssl](https://github.com/sfackler/rust-openssl) - OpenSSL bindings for Rust.