diff --git a/config b/config
index 0c926c7b..bbeb19d1 100644
--- a/config
+++ b/config
@@ -148,8 +148,9 @@
 #htpasswd_filename = /etc/radicale/users
 
 # Htpasswd encryption method
-# Value: plain | bcrypt | md5 | sha256 | sha512 | autodetect
+# Value: plain | bcrypt | md5 | sha256 | sha512 | argon2 | autodetect
 # bcrypt requires the installation of 'bcrypt' module.
+# argon2 requires the installation of 'argon2-cffi' module.
 #htpasswd_encryption = autodetect
 
 # Enable caching of htpasswd file based on size and mtime_ns