diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 00353fa5..7c124b80 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -20,6 +20,14 @@
 
   <main>
     <div>
+      <div class="row">
+        <div class="card-panel light-blue darken-3 col s12">
+          <p class="white-text center">
+            Important notice: Notebook.ai will be going down temporarily for emergency maintenance to upgrade the database at <strong>22:00 UTC</strong>.
+            This maintenance should last no longer than 1 hour.
+           </p>
+        </div>
+      </div>
       <div class="row">
         <div class="col s12 m12 <%= (current_user && current_user.content_count > 0) ? 'l9' : 'l12' %>">
           <%= yield %>