diff --git a/README.md b/README.md
index 31366973..9bad129c 100644
--- a/README.md
+++ b/README.md
@@ -257,6 +257,7 @@ _Libraries for implementing authentications schemes._
 - [jwt](https://github.com/pascaldekloe/jwt) - Lightweight JSON Web Token (JWT) library.
 - [jwt](https://github.com/cristalhq/jwt) - Safe, simple and fast JSON Web Tokens for Go.
 - [jwt-auth](https://github.com/adam-hanna/jwt-auth) - JWT middleware for Golang http servers with many configuration options.
+- [keto](https://github.com/ory/keto) - Open Source (Go) implementation of "Zanzibar: Google's Consistent, Global Authorization System". Ships gRPC, REST APIs, newSQL, and an easy and granular permission language. Supports ACL, RBAC, and other access models.
 - [loginsrv](https://github.com/tarent/loginsrv) - JWT login microservice with plugable backends such as OAuth2 (Github), htpasswd, osiam.
 - [oauth2](https://github.com/golang/oauth2) - Successor of goauth2. Generic OAuth 2.0 package that comes with JWT, Google APIs, Compute Engine and App Engine support.
 - [osin](https://github.com/openshift/osin) - Golang OAuth2 server library.