diff --git a/app/assets/javascripts/admin/comments.js.coffee b/app/assets/javascripts/admin/comments.js.coffee
index b5489787a..98a91d148 100644
--- a/app/assets/javascripts/admin/comments.js.coffee
+++ b/app/assets/javascripts/admin/comments.js.coffee
@@ -36,7 +36,8 @@ ready = ->
     e.preventDefault()
     $.ajax
       url: $(this).attr('action')
-      headers: 'Content-Type': 'application/json'
+      data:
+        authenticity_token: $("meta[name='csrf-token']").attr("content")
       type: 'DELETE'
       success: () =>
         numberWrapper = $(@).closest(".panel").find(".panel-heading .comments-number")
diff --git a/app/controllers/admin/comments_controller.rb b/app/controllers/admin/comments_controller.rb
index 938f5c908..71d36edb8 100644
--- a/app/controllers/admin/comments_controller.rb
+++ b/app/controllers/admin/comments_controller.rb
@@ -39,9 +39,9 @@ def update
     log_event if resource.update(update_params)
 
     respond_to do |format|
-      format.html do 
+      format.html do
         render_flash_message_for(resource)
-        redirect_to([namespace_name, form_answer]) 
+        redirect_to([namespace_name, form_answer])
       end
       format.js { head :ok }
     end
@@ -54,7 +54,7 @@ def destroy
 
     respond_to do |format|
       format.json { render(json: :ok)}
-      format.html do 
+      format.html do
         render_flash_message_for(resource)
         redirect_to(admin_form_answer_path(form_answer))
       end