diff --git a/templates/default/invitation.html.ep b/templates/default/invitation.html.ep
index fae4e02..0d015f8 100644
--- a/templates/default/invitation.html.ep
+++ b/templates/default/invitation.html.ep
@@ -3,7 +3,7 @@
 %= include 'public_toolbar'
 <div class="container-fluid">
   <div class="well publicForm">
-    <form>
+    <form method="post">
       <legend class="text-center">
         %= l('INVITATION_RESPONSE')
       </legend>