diff --git a/app/controllers/admin/site_panel_controller.rb b/app/controllers/admin/site_panel_controller.rb
index df43b64..384b82a 100644
--- a/app/controllers/admin/site_panel_controller.rb
+++ b/app/controllers/admin/site_panel_controller.rb
@@ -197,7 +197,7 @@ class Admin::SitePanelController < OrbitAdminController
   def install_certbot
     extra_text = ""
     if params[:server_name].present?
-      extra_text = "[#{params[:server_name].gsub(/[\(\)\[\]]/){|ff| "\\"+ff }}]"
+      extra_text = "['#{params[:server_name].gsub(/[\(\)\[\]]/){|ff| "\\"+ff }}']"
     end
     Thread.new do
       system("bundle exec rake create_site:install_certbot#{extra_text}")