Securing the Vaultwarden ADMIN_TOKEN with an Argon2 Hash in Docker

Run Vaultwarden with Argon2-Hashed ADMIN_TOKEN in Docker

 Posted on January 19, 2026  (Last modified on August 19, 2026)  • Other languages: 日本語

Making the Vaultwarden ADMIN_TOKEN secure with an Argon2 hash Introduction When you open the Vaultwarden admin page, the following warning is sometimes displayed. Copy You are using a plain text `ADMIN_TOKEN` which is insecure. Please generate a secure Argon2 PHC string by using `vaultwarden hash` or `argon2`. Since Vaultwarden 1.28.0, hashing ADMIN_TOKEN with Argon2 is recommended. In this article I explain how to configure ADMIN_TOKEN securely in a Docker Compose environment. [Read More]
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