diff --git a/app.rb b/app.rb
index 6783cabe..fe82b9ca 100644
--- a/app.rb
+++ b/app.rb
@@ -10,25 +10,26 @@ require_relative './lib/ledger'
 class LedgerRbApp < Sinatra::Base
   helpers Sinatra::Param
 
+  before  do
+    content_type :json, 'charset' => 'utf-8'
+  end
+
   get '/' do
+    content_type :html
     send_file './public/app/index.html'
   end
 
   get '/api/ledger/accounts/?' do
-    content_type :json
-
     Ledger.accounts.to_json
   end
 
   get '/api/ledger/accounts/depth/:depth/?' do
-    content_type :json
     param :depth, Integer, required: true
 
     Ledger.accounts( params[ :depth ] ).to_json
   end
 
   get '/api/ledger/register/:period/?' do
-    content_type :json
     param :period, String, required: true       # TODO: restrict possible values to [ 'yearly', 'monthly' ]
     param :categories, Array, default: Ledger.accounts( 1 )
 
@@ -41,29 +42,23 @@ class LedgerRbApp < Sinatra::Base
   end
 
   get '/api/ledger/balance/?' do
-    content_type :json
-
-    Ledger.balance#.to_json
+    Ledger.balance # .to_json
   end
 
   get '/api/ledger/balance/depth/:depth/?' do
-    content_type :json
     param :depth, Integer, required: true
 
-    Ledger.balance( false, params[ :depth ] )#.to_json
+    Ledger.balance( false, params[ :depth ] ) # .to_json
   end
 
   get '/api/ledger/cleared/?' do
-    content_type :json
-
-    Ledger.balance( true )#.to_json
+    Ledger.balance( true ) # .to_json
   end
 
   get '/api/ledger/cleared/depth/:depth/?' do
-    content_type :json
     param :depth, Integer, required: true
 
-    Ledger.balance( true, params[ :depth ] )#.to_json
+    Ledger.balance( true, params[ :depth ] ) # .to_json
   end
 
   get '/api/ledger/version/?' do