diff --git a/plugin.rb b/plugin.rb
index 4d6da84..b77f27a 100644
--- a/plugin.rb
+++ b/plugin.rb
@@ -1,6 +1,6 @@
 # name: df-core
 # about: A common functionality of my Discourse plugins.
-# version: 1.3.0
+# version: 1.4.0
 # authors: Dmitry Fedyuk
 # url: https://discourse.pro
 #register_asset 'javascripts/lib/sprintf.js'
@@ -40,11 +40,18 @@
 gem 'domain_name', '0.5.20170404' # The latest version on today (2017-06-16)
 gem 'http-cookie', '1.0.3' # The latest version on today (2017-06-16)
 gem 'netrc', '0.11.0' # The latest version on today (2017-06-16)
-gem 'rest-client', '2.0.2' # The latest version on today (2017-06-16)
 # 2018-04-08
 # «Could not find 'mime-types' (< 4.0, >= 1.16) among 260 total gem(s)»
 # https://github.com/discourse-pro/df-core/issues/5
-gem 'mime-types', '3.1'
+# https://rubygems.org/gems/http-accept
+#gem 'http-accept', '1.7.0' # The latest version on today (2018-04-08)
+#require 'http-accept'
+gem 'mime-types-data', '3.2016.0521' # The latest version on today (2018-04-08)
+gem 'mime-types', '3.1' # The latest version on today (2018-04-08)
+# 2017-06-16
+# The latest version on today (2017-06-16)
+# https://rubygems.org/gems/rest-client
+gem 'rest-client', '2.0.2'
 # 2016-12-12
 # Оригинальный https://github.com/nov/paypal-express перестал работать:
 # https://github.com/nov/paypal-express/issues/99