diff --git a/roles/belenios/tasks/main.yml b/roles/belenios/tasks/main.yml
index 779273ff..d2d0de02 100644
--- a/roles/belenios/tasks/main.yml
+++ b/roles/belenios/tasks/main.yml
@@ -50,7 +50,7 @@
   git:
     repo: https://gitlab.inria.fr/belenios/belenios.git
     dest: /var/local/belenios
-    version: "1.14"
+    version: "1.15"
     force: true
   register: git_result
 
diff --git a/roles/belenios/templates/ocsigenserver/conf.d/belenios.conf.j2 b/roles/belenios/templates/ocsigenserver/conf.d/belenios.conf.j2
index 8ff2715f..a8d462dd 100644
--- a/roles/belenios/templates/ocsigenserver/conf.d/belenios.conf.j2
+++ b/roles/belenios/templates/ocsigenserver/conf.d/belenios.conf.j2
@@ -62,7 +62,9 @@
         <uuid length="14"/>
         <gdpr uri="https://www.belenios.org/rgpd.html"/>
         <contact uri="mailto:{{ belenios.email_contact }}"/>
-        <server mail="{{ belenios.email_from }}"/>
+        <server mail="{{ belenios.email_from }}" return-path="{{ belenios.email_contact }}"/>
+        <auth-export name="builtin-cas"/>
+        <auth-export name="builtin-password"/>
         <auth name="{{ belenios.cas.name }}"><cas server="{{ belenios.cas.server }}"/></auth>
         <source file="/usr/share/belenios-server/belenios.tar.gz"/>
         <default-group file="/usr/share/belenios-server/groups/default.json"/>