diff --git a/pgbouncer/README.md b/pgbouncer/README.md
index 2542f497..bf1914fc 100644
--- a/pgbouncer/README.md
+++ b/pgbouncer/README.md
@@ -14,6 +14,7 @@ Main variables are :
 * `pgbouncer_listen_port`: the listen post for PgBouncer (default: `6432`),
 * `pgbouncer_databases`: the databases that clients of PgBouncer can connect to,
 * `pgbouncer_account_list`: the accounts that clients of PgBouncer can connect to.
+* `pgbouncer_auth_type`: the variable `auth_type` define by default to `scram-sha-256`, if you installed PgBouncer on PostgreSQL version inferior to 14, set this variable to `md5`.
 
 The variable `pgbouncer_databases` must have the `name`, `host` and `port` attributes. The variable can be defined like this:
 
diff --git a/pgbouncer/defaults/main.yml b/pgbouncer/defaults/main.yml
index 7b246270..4290afa5 100644
--- a/pgbouncer/defaults/main.yml
+++ b/pgbouncer/defaults/main.yml
@@ -2,6 +2,8 @@
 pgbouncer_listen_addr: "127.0.0.1"
 pgbouncer_listen_port: "6432"
 
+pgbouncer_auth_type: "scram-sha-256"
+
 pgbouncer_databases: []
 
 pgbouncer_account_list: []
diff --git a/pgbouncer/templates/pgbouncer.ini.j2 b/pgbouncer/templates/pgbouncer.ini.j2
index 30d34ccb..3bed0c5b 100644
--- a/pgbouncer/templates/pgbouncer.ini.j2
+++ b/pgbouncer/templates/pgbouncer.ini.j2
@@ -11,7 +11,7 @@ listen_addr = {{ pgbouncer_listen_addr }}
 listen_port = {{ pgbouncer_listen_port }}
 unix_socket_dir =
 
-auth_type = scram-sha-256
+auth_type = {{ pgbouncer_auth_type }}
 auth_file = /etc/pgbouncer/userlist.txt
 
 # La connexion au serveur redevient libre lorsque le client termine une transaction
@@ -26,4 +26,4 @@ default_pool_size = 20
 
 # Ne pas enregistrer les connexions qui se passent bien
 log_connections = 0
-log_disconnections = 0
+log_disconnections = 0
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