diff --git a/roles/postfix/templates/stunnel.conf.j2 b/roles/postfix/templates/stunnel.conf.j2
index 09229c1..59fee92 100644
--- a/roles/postfix/templates/stunnel.conf.j2
+++ b/roles/postfix/templates/stunnel.conf.j2
@@ -7,3 +7,4 @@ client = yes
 connect = {{ mail_server }}:465
 CAfile = {{ tls_bundle }}
 verify = 2
+sslVersion = TLSv1.2