diff --git a/Gemfile b/Gemfile
index 27532fa..37c3972 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,6 +11,12 @@ group :test do
   gem 'smart_proxy', :git => "https://github.com/theforeman/smart-proxy", :branch => "develop"
 end
 
+if RUBY_VERSION < "2.0"
+  gem 'json', '< 2.0.0'
+  gem 'rest-client', '< 1.7'
+  gem 'mime-types', '~> 1.0'
+end
+
 # load bundler.d
 Dir["#{File.dirname(__FILE__)}/bundler.d/*.rb"].each do |bundle|
   self.instance_eval(Bundler.read_file(bundle))
diff --git a/lib/smart_proxy_dynflow/plugin.rb b/lib/smart_proxy_dynflow/plugin.rb
index c3f374d..64890d3 100644
--- a/lib/smart_proxy_dynflow/plugin.rb
+++ b/lib/smart_proxy_dynflow/plugin.rb
@@ -14,6 +14,7 @@ class Plugin < Proxy::Plugin
     https_rackup_path File.expand_path(rackup_path, File.expand_path("../", __FILE__))
 
     settings_file "dynflow.yml"
+    requires :foreman_proxy, ">= 1.12.0"
     default_settings :core_url => 'http://localhost:8008'
     plugin :dynflow, Proxy::Dynflow::VERSION
   end
diff --git a/lib/smart_proxy_dynflow_core/settings.rb b/lib/smart_proxy_dynflow_core/settings.rb
index 32b34a6..c028a31 100644
--- a/lib/smart_proxy_dynflow_core/settings.rb
+++ b/lib/smart_proxy_dynflow_core/settings.rb
@@ -69,12 +69,12 @@ def self.loaded!
       Log.reload!
     end
 
-    def self.load_from_proxy(plugin)
+    def self.load_from_proxy(settings)
       PROXY_SETTINGS.each do |key|
         SETTINGS[key] = Proxy::SETTINGS[key]
       end
       PLUGIN_SETTINGS.each do |key|
-        SETTINGS[key] = plugin.settings[key]
+        SETTINGS[key] = settings[key]
       end
       SETTINGS.plugins.values.each { |plugin| plugin.load_settings_from_proxy }
       Settings.loaded!