diff --git a/lib/hotwire/spark/installer.rb b/lib/hotwire/spark/installer.rb
index 8eefb6e..ab53d0b 100644
--- a/lib/hotwire/spark/installer.rb
+++ b/lib/hotwire/spark/installer.rb
@@ -11,14 +11,14 @@ def install
     monitor_paths
   end
 
-  def configure_middleware
-    middleware.use Hotwire::Spark::Middleware
-  end
-
   private
     attr_reader :application
     delegate :middleware, to: :application
 
+    def configure_middleware
+      middleware.use Hotwire::Spark::Middleware
+    end
+
     def configure_cable_server
       application.routes.prepend do
         mount Hotwire::Spark.cable_server => "/hotwire-spark", internal: true, anchor: true