diff --git a/app/views/repositories/_share_repository_modal.html.erb b/app/views/repositories/_share_repository_modal.html.erb
index 67e45bf49..f36c3f646 100644
--- a/app/views/repositories/_share_repository_modal.html.erb
+++ b/app/views/repositories/_share_repository_modal.html.erb
@@ -54,7 +54,7 @@
             </div>
           </div>
         </div>
-        <%= hidden_field_tag 'permission_changes', {}%>
+        <%= hidden_field_tag 'permission_changes', '{}' %>
         <div class="modal-footer">
           <%= f.submit t("repositories.index.modal_share.submit"), class: "btn btn-primary" %>
         </div>