diff --git a/plugins_auth_ldap.md b/plugins_auth_ldap.md
index ba96206..ee5dcb9 100644
--- a/plugins_auth_ldap.md
+++ b/plugins_auth_ldap.md
@@ -37,7 +37,8 @@ Available hashes are:
 `PBKDF2` is only supported as a contrib module, so you might have to install the `openldap2-contrib` package on your LDAP server and configure `slapd.conf` like this: `moduleload pw-pbkdf2.la`
 
 `Argon2` was, like `PBKDF2`, provided as a contrib module until OpenLDAP 2.5.0. Starting with 2.5.0 it is a core module, but
-still needs to be configured like `moduleload argon2.la`
+still needs to be configured like `moduleload argon2.la`.
+You also need to install Flaschengeist with argon support `pip3 install --user ".[ldap,argon]"`
 
 ### Set up SSL (LDAP over SSL)
 Regardless it is called SSL we will use TLS as SSL is deprecated.