diff --git a/reiso.exo.mintcloud.ch.yaml b/reiso.exo.mintcloud.ch.yaml
index 4d054d6..62f5452 100644
--- a/reiso.exo.mintcloud.ch.yaml
+++ b/reiso.exo.mintcloud.ch.yaml
@@ -34,6 +34,7 @@ addonsGitRepos:
   - https://github.com/OCA/web.git#18.0
   - https://github.com/OCA/hr-attendance.git#18.0
   - https://github.com/OCA/server-env.git#18.0
+  - https://github.com/OCA/mass-mailing.git#18.0
   - https://github.com/sozialinfo/odoo-apps-sozialinfo.git#18.0
 pythonInstall:
   - astor