diff --git a/.rubocop.yml b/.rubocop.yml
index 62d4b5b..ebdd5a0 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -3,6 +3,7 @@ inherit_from:
 
 AllCops:
   TargetRubyVersion: 2.0
+  TargetRailsVersion: 4.2
 
 Rails:
   Enabled: true
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 9445d4a..e55f38c 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -8,6 +8,12 @@ Lint/RescueException:
   Exclude:
     - 'lib/foreman_xen/vnc_tunnel.rb'
 
+# Offense count: 9
+Lint/RescueWithoutErrorClass:
+  Exclude:
+    - 'app/models/foreman_xen/xenserver.rb'
+    - 'lib/foreman_xen/engine.rb'
+
 # Offense count: 2
 # Cop supports --auto-correct.
 # Configuration parameters: IgnoreEmptyBlocks, AllowUnusedKeywordArguments.
diff --git a/Gemfile b/Gemfile
index 3c20a52..355917c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,4 +3,4 @@ source 'https://rubygems.org'
 gemspec
 
 gem 'nokogiri', '< 1.7', require: false if RUBY_VERSION.start_with? '2.0.'
-gem 'rubocop', '~> 0.49.1', require: false
+gem 'rubocop', '~> 0.50.0', require: false
diff --git a/foreman_xen.gemspec b/foreman_xen.gemspec
index 92e13d3..a1fb896 100644
--- a/foreman_xen.gemspec
+++ b/foreman_xen.gemspec
@@ -1,5 +1,3 @@
-# encoding: utf-8
-
 $LOAD_PATH.push File.expand_path('../lib', __FILE__)
 
 # Maintain your gem's version: