diff --git a/lib/letsencrypt-rails-heroku/railtie.rb b/lib/letsencrypt-rails-heroku/railtie.rb
index 636da62..11699ae 100644
--- a/lib/letsencrypt-rails-heroku/railtie.rb
+++ b/lib/letsencrypt-rails-heroku/railtie.rb
@@ -3,6 +3,14 @@ class LetsencryptRailsHerokuRailtie < Rails::Railtie
     Letsencrypt.configure
   end
 
+  initializer "letsencrypt_rails_heroku.configure_rails_initialization" do |app|
+    if app.config.force_ssl
+      app.middleware.insert_before ActionDispatch::SSL, Letsencrypt::Middleware
+    else
+      app.middleware.use Letsencrypt::Middleware
+    end
+  end
+
   rake_tasks do
     load 'tasks/letsencrypt.rake'
   end