diff --git a/portal/info.html b/portal/info.html
index a69868a..734b7c6 100644
--- a/portal/info.html
+++ b/portal/info.html
@@ -1,3 +1,5 @@
+<div class="wrapper messages warning">{{t_obsolete_version}}</div>
+
 <div class="ynh-wrapper user">
   <ul class="user-menu">
     <li><a class="icon icon-connexion" href="?action=logout">{{t_logout}}</a></li>
diff --git a/portal/locales/en.json b/portal/locales/en.json
index 9730672..f766e7c 100644
--- a/portal/locales/en.json
+++ b/portal/locales/en.json
@@ -19,6 +19,7 @@
    "confirm": "Confirm",
    "login": "Login",
    "logout": "Logout",
+   "obsolete_version": "The version of YunoHost running on this server is obsolete and should be upgraded to YunoHost 3.x / Stretch. Please contact your administrator about this.",
    "password_changed": "Password successfully changed",
    "password_changed_error": "An error occurred on password changing",
    "password_not_match": "New passwords don't match",