diff --git a/app.rb b/app.rb
index 8cc6034c..b07a0bf9 100644
--- a/app.rb
+++ b/app.rb
@@ -2,7 +2,7 @@
 
 require 'json'
 
-Bundler.require( :default, :development ) # require tout les gems définis dans Gemfile
+Bundler.require( :default, ENV[ 'RACK_ENV' ].to_sym ) # require tout les gems définis dans Gemfile
 
 require_relative './lib/ledger'
 
diff --git a/config.ru b/config.ru
index 340f8d25..198e9116 100644
--- a/config.ru
+++ b/config.ru
@@ -1,11 +1,13 @@
 # encoding: utf-8
 
+require_relative 'config/options'
 require_relative './app'
 
 configure :development do
   Sinatra::Application.reset!
   use Rack::Reloader
 end
+
 use Rack::Rewrite do
   rewrite %r{^/(.*(css|js|ttf|woff|html|png|jpg|jpeg|gif)$)}, '/app/$1'
 end
diff --git a/config/options.rb b/config/options.rb
new file mode 100644
index 00000000..5b66c4ea
--- /dev/null
+++ b/config/options.rb
@@ -0,0 +1,3 @@
+# encoding: utf-8
+
+ENV[ 'RACK_ENV' ] = 'development'