diff --git a/.rubocop.yml b/.rubocop.yml
index 7c544b31b..c78567413 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,12 +1,16 @@
-AllCops:
-  RunRailsCops: true
-
-# Default enabled
+# Default enabled cops
 # https://github.com/bbatsov/rubocop/blob/master/config/enabled.yml
 
 # TODO:
 # https://github.com/bbatsov/rubocop#includingexcluding-files
 
+AllCops:
+  RunRailsCops: true
+  Exclude:
+    - 'bin/rails'
+    - 'bin/rake'
+    - 'bin/spring'
+    - 'db/schema.rb'
 
 Metrics/LineLength:
   Description: 'Limit lines to 80 characters.'
@@ -131,7 +135,6 @@ Style/SelfAssignment:
   StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#self-assignment'
   Enabled: false
 
-# [Corrected] Redundant curly braces around a hash parameter.
 Style/BracesAroundHashParameters:
   Description: 'Enforce braces style around hash parameters.'
   Enabled: false
@@ -141,10 +144,7 @@ Rails/FindEach:
   Enabled: false
 
 
-
-
-
-
+# TODO
 
 Style/Documentation:
   Description: 'Document classes and non-namespace modules.'
@@ -202,3 +202,88 @@ Metrics/AbcSize:
                  A calculated magnitude based on number of assignments,
                  branches, and conditions.
   Enabled: false
+
+Style/RedundantSelf:
+  Enabled: false
+Style/Next:
+  Enabled: false
+Rails/Output:
+  Enabled: false
+Lint/UselessAccessModifier:
+  Enabled: false
+Style/CommentIndentation:
+  Enabled: false
+Metrics/CyclomaticComplexity:
+  Enabled: false
+Style/ClassAndModuleChildren:
+  Enabled: false
+Lint/StringConversionInInterpolation:
+  Enabled: false
+Metrics/PerceivedComplexity:
+  Enabled: false
+Style/FileName:
+  Enabled: false
+Style/GlobalVars:
+  Enabled: false
+Rails/TimeZone:
+  Enabled: false
+Rails/TimeZone:
+  Enabled: false
+Metrics/BlockNesting:
+  Enabled: false
+Lint/RescueException:
+  Enabled: false
+Style/EachWithObject:
+  Enabled: false
+Style/PredicateName:
+  Enabled: false
+Style/ClassVars:
+  Enabled: false
+Lint/LiteralInCondition:
+  Enabled: false
+Style/PredicateName:
+  Enabled: false
+Style/SpaceBeforeComment:
+  Enabled: false
+Lint/UselessAssignment:
+  Enabled: false
+Lint/NonLocalExitFromIterator:
+  Enabled: false
+Style/ColonMethodCall:
+  Enabled: false
+Rails/Date:
+  Enabled: false
+Style/VariableName:
+  Enabled: false
+Lint/UnreachableCode:
+  Enabled: false
+Lint/ShadowingOuterLocalVariable:
+  Enabled: false
+Style/InfiniteLoop:
+  Enabled: false
+Lint/AmbiguousRegexpLiteral:
+  Enabled: false
+Rails/Validation:
+  Enabled: false
+Style/MultilineOperationIndentation:
+  Enabled: false
+Style/OneLineConditional:
+  Enabled: false
+Style/ClassMethods:
+  Enabled: false
+Lint/Eval:
+  Enabled: false
+Rails/HasAndBelongsToMany:
+  Enabled: false
+Style/MethodName:
+  Enabled: false
+Style/ModuleFunction:
+  Enabled: false
+Style/AccessModifierIndentation:
+  Enabled: false
+Lint/Loop:
+  Enabled: false
+Style/For:
+  Enabled: false
+Style/WhileUntilDo:
+  Enabled: false
diff --git a/app/controllers/import_otrs_controller.rb b/app/controllers/import_otrs_controller.rb
index fdb3d99c5..d55cc57a8 100644
--- a/app/controllers/import_otrs_controller.rb
+++ b/app/controllers/import_otrs_controller.rb
@@ -93,7 +93,7 @@ class ImportOtrsController < ApplicationController
   def import_status
     return if setup_done_response
 
-    state = Import::OTRS2.get_current_state
+    state = Import::OTRS2.current_state
 
     render json: {
       data: state,
diff --git a/app/models/scheduler.rb b/app/models/scheduler.rb
index e2859dcc0..4802a7241 100644
--- a/app/models/scheduler.rb
+++ b/app/models/scheduler.rb
@@ -116,7 +116,7 @@ class Scheduler < ApplicationModel
         sleep(wait)
         logger.info '*** worker loop'
       else
-        printf "*** #{count} jobs processed at %.4f j/s, %d failed ...\n" % [count / realtime, result.last]
+        format "*** #{count} jobs processed at %.4f j/s, %d failed ...\n", count / realtime, result.last
       end
     end
   end
diff --git a/app/models/ticket/number/date.rb b/app/models/ticket/number/date.rb
index ea5c1e8b0..da9ef2fc2 100644
--- a/app/models/ticket/number/date.rb
+++ b/app/models/ticket/number/date.rb
@@ -33,7 +33,7 @@ module Ticket::Number::Date
     end
 
     system_id = Setting.get('system_id') || ''
-    number = t.strftime('%Y%m%d') + system_id.to_s + sprintf( '%04d', counter_increment)
+    number = t.strftime('%Y%m%d') + system_id.to_s + format('%04d', counter_increment)
 
     # calculate a checksum
     # The algorithm to calculate the checksum is derived from the one
diff --git a/config/initializers/omniauth.rb b/config/initializers/omniauth.rb
index e14de3c8a..94c16be9a 100644
--- a/config/initializers/omniauth.rb
+++ b/config/initializers/omniauth.rb
@@ -2,7 +2,7 @@ Rails.application.config.middleware.use OmniAuth::Builder do
 
   # twitter database connect
   provider :twitter_database, 'not_change_will_be_set_by_databse', 'not_change_will_be_set_by_databse',
-    client_options: { authorize_path: '/oauth/authorize', site: 'https://api.twitter.com' }
+           client_options: { authorize_path: '/oauth/authorize', site: 'https://api.twitter.com' }
 
   # facebook database connect
   provider :facebook_database, 'not_change_will_be_set_by_databse', 'not_change_will_be_set_by_databse'
@@ -12,6 +12,6 @@ Rails.application.config.middleware.use OmniAuth::Builder do
 
   # google database connect
   provider :google_oauth2_database, 'not_change_will_be_set_by_databse', 'not_change_will_be_set_by_databse',
-    authorize_options: { access_type: 'online', approval_prompt: '' }
+           authorize_options: { access_type: 'online', approval_prompt: '' }
 
 end
diff --git a/lib/import/otrs.rb b/lib/import/otrs.rb
index f28fc0e3b..747bca250 100644
--- a/lib/import/otrs.rb
+++ b/lib/import/otrs.rb
@@ -167,7 +167,7 @@ module Import::OTRS
       threads[thread].join
     }
 
-      end
+  end
 
   def self.diff_worker
     return if !Setting.get('import_mode')
diff --git a/lib/import/otrs2.rb b/lib/import/otrs2.rb
index bd7056f69..8aff3c442 100644
--- a/lib/import/otrs2.rb
+++ b/lib/import/otrs2.rb
@@ -212,9 +212,9 @@ module Import::OTRS2
 
 =begin
 
-  get object statisitic from server ans save it in cache
+  get object statistic from server ans save it in cache
 
-  result = get_statisitic('Subaction=List')
+  result = statistic('Subaction=List')
 
   return
 
@@ -226,7 +226,7 @@ module Import::OTRS2
 
 =end
 
-  def self.get_statisitic
+  def self.statistic
 
     # check cache
     cache = Cache.get('import_otrs_stats')
@@ -246,7 +246,7 @@ module Import::OTRS2
 
   return current import state
 
-  result = get_current_state
+  result = current_state
 
   return
 
@@ -263,8 +263,8 @@ module Import::OTRS2
 
 =end
 
-  def self.get_current_state
-    data = self.get_statisitic
+  def self.current_state
+    data = self.statistic
     base = Group.count + Ticket::State.count + Ticket::Priority.count
     base_total = data['Queue'] + data['State'] + data['Priority']
     user = User.count
diff --git a/test/browser_test_helper.rb b/test/browser_test_helper.rb
index 7244b049c..c66024eb8 100644
--- a/test/browser_test_helper.rb
+++ b/test/browser_test_helper.rb
@@ -77,8 +77,8 @@ class TestCase < Test::Unit::TestCase
   def screenshot(params)
     instance = params[:browser] || @browser
     comment = params[:comment] || ''
-    filename = "tmp/#{Time.zone.now.strftime("screenshot_%Y_%m_%d__%H_%M_%S")}_#{comment}_#{instance.hash}.png"
-    log('screenshot', {filename: filename})
+    filename = "tmp/#{Time.zone.now.strftime('screenshot_%Y_%m_%d__%H_%M_%S')}_#{comment}_#{instance.hash}.png"
+    log('screenshot', { filename: filename })
     instance.save_screenshot(filename)
   end
 
diff --git a/test/test_helper.rb b/test/test_helper.rb
index cc205b0a0..5bd0c6865 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -45,12 +45,12 @@ class ActiveSupport::TestCase
     puts 'teardown'
 
     # check if jobs are proccessed
-    if !Delayed::Job.all.empty?
-      Delayed::Job.where('failed_at != NULL').each {|job|
-        assert( false, "not processable job #{jobs.inspect}" )
-      }
-      Delayed::Job.all.destroy_all
-    end
+    return if Delayed::Job.all.empty?
+
+    Delayed::Job.where('failed_at != NULL').each {|job|
+      assert( false, "not processable job #{jobs.inspect}" )
+    }
+    Delayed::Job.all.destroy_all
   end
 
   # Add more helper methods to be used by all tests here...
diff --git a/vendor/lib/twitter_database.rb b/vendor/lib/twitter_database.rb
index 4f58ed12e..4ae2900e4 100644
--- a/vendor/lib/twitter_database.rb
+++ b/vendor/lib/twitter_database.rb
@@ -6,8 +6,8 @@ class TwitterDatabase < OmniAuth::Strategies::Twitter
     # database lookup
 #        puts 'TwitterDatabase -> initialize'
     config = Setting.get('auth_twitter_credentials') || {}
-    args[0] = config['key'] 
-    args[1] = config['secret'] 
+    args[0] = config['key']
+    args[1] = config['secret']
     super
   end