diff --git a/README.md b/README.md
index b95cdca..b7130e3 100644
--- a/README.md
+++ b/README.md
@@ -930,6 +930,7 @@ _Libraries that handle security, authentication, authorization or session manage
 - [Nbvcxz](https://github.com/GoSimpleLLC/nbvcxz) - Advanced password strength estimation.
 - [OACC](http://oaccframework.org) - Provides permission-based authorization services.
 - [pac4j](https://github.com/pac4j/pac4j) - Security engine.
+- [Password4j](https://github.com/Password4j/password4j) - User-friendly cryptographic library that supports Argon2, Bcrypt, Scrypt, PBKDF2 and various other cryptographic hash functions.
 - [SecurityBuilder](https://github.com/tersesystems/securitybuilder) - Fluent Builder API for JCA and JSSE classes and especially X.509 certificates.
 - [SSLContext-Kickstart](https://github.com/Hakky54/sslcontext-kickstart) - High-level SSL context builder for configuring HTTP clients with SSL/TLS.
 - [Themis](https://github.com/cossacklabs/themis) - Multi-platform high-level cryptographic library provides easy-to-use encryption for protecting sensitive data: secure messaging with forward secrecy, secure data storage (AES256GCM); suits for building end-to-end encrypted applications.