diff --git a/README.md b/README.md
index 2f8f5a6..617f9cd 100644
--- a/README.md
+++ b/README.md
@@ -28,3 +28,5 @@ Or deploy it!
   bundle install
   bundle exec rackup # Launch Dajare server
 ```
+
+hogehoge
diff --git a/src/dajare/app.rb b/src/dajare/app.rb
index e49d5f6..5da724c 100755
--- a/src/dajare/app.rb
+++ b/src/dajare/app.rb
@@ -1,4 +1,6 @@
-require "cgi"
+# frozen_string_literal: true
+
+require 'cgi'
 require 'sinatra/base'
 require 'sinatra/json'
 require 'pebbles/dajare'
@@ -8,18 +10,18 @@
 module Dajare
   class App < Sinatra::Base
     set :erb, layout: true
-    set :views,  File.expand_path('./views', __dir__)
+    set :views, File.expand_path('./views', __dir__)
     set :public_folder, File.expand_path('../../public', __dir__)
 
     enable :logging
 
     helpers Dajare::Helpers
 
-    get "/" do
+    get '/' do
       if params[:text]
         logger.info params[:text]
         @original = params[:text]
-        @original.chomp! if @original
+        @original&.chomp!
         @dajare = dajarize(@original.chomp).sample
       end