diff --git a/group_vars/all b/group_vars/all
index 28a525e..cc40e2b 100644
--- a/group_vars/all
+++ b/group_vars/all
@@ -100,6 +100,9 @@ gitea_disable_registration: 'false'
 # Enable email notifications in Gitea (“true” or “false”, as a character string).
 gitea_enable_notify_email: 'true'
 
+# Space-separated list of mime types to accept for attachments (“*/*” means: “anything”).
+gitea_mime_attach: 'image/jpeg image/png application/zip application/gzip'
+
 # Maximum size of HTTP and PHP uploads.
 http_max_upload: 10000M
 
diff --git a/roles/ihmgit_back/tasks/main.yml b/roles/ihmgit_back/tasks/main.yml
index e95b788..9fc22a6 100644
--- a/roles/ihmgit_back/tasks/main.yml
+++ b/roles/ihmgit_back/tasks/main.yml
@@ -98,6 +98,7 @@
     - {s: mailer, o: USE_SENDMAIL, v: 'true'}
     - {s: session, o: PROVIDER, v: file}
     - {s: session, o: COOKIE_SECURE, v: 'true'}
+    - {s: attachment, o: ALLOWED_TYPES, v: '{{gitea_mime_attach | replace(" ", "|")}}'}
     - {s: log, o: MODE, v: console}
     - {s: log, o: LEVEL, v: Warn}
     - {s: log.console, o: LEVEL, v: Warn}