diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 6b9d58f..bcdd4b9 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -6,69 +6,11 @@
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: IndentationWidth.
-# SupportedStyles: outdent, indent
-Layout/AccessModifierIndentation:
-  EnforcedStyle: outdent
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle, IndentationWidth.
-# SupportedStyles: with_first_argument, with_fixed_indentation
-Layout/ArgumentAlignment:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-Layout/EmptyLineAfterGuardClause:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-    - 'lib/omniauth/strategies/cas/service_ticket_validator.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle, IndentationWidth.
-# SupportedStyles: special_inside_parentheses, consistent, align_braces
-Layout/FirstHashElementIndentation:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-Layout/SpaceAfterColon:
-  Exclude:
-    - 'lib/omniauth/strategies/cas/logout_request.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-Layout/SpaceAfterComma:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-    - 'lib/omniauth/strategies/cas/logout_request.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces.
-# SupportedStyles: space, no_space
-# SupportedStylesForEmptyBraces: space, no_space
-Layout/SpaceBeforeBlockBraces:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: final_newline, final_blank_line
-Layout/TrailingEmptyLines:
-  Exclude:
-    - 'lib/omniauth/cas.rb'
-
 # This cop supports safe autocorrection (--autocorrect).
 Lint/EnsureReturn:
   Exclude:
     - 'lib/omniauth/strategies/cas/logout_request.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: IgnoreEmptyBlocks, AllowUnusedKeywordArguments.
-Lint/UnusedBlockArgument:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 Lint/UselessAssignment:
   Exclude:
@@ -88,7 +30,7 @@ Metrics/BlockNesting:
 
 # Configuration parameters: CountComments, CountAsOne.
 Metrics/ClassLength:
-  Max: 149
+  Max: 148
 
 # Configuration parameters: AllowedMethods, AllowedPatterns.
 Metrics/CyclomaticComplexity:
@@ -117,12 +59,6 @@ Naming/FileName:
   Exclude:
     - 'lib/omniauth-cas.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: PreferredName.
-Naming/RescuedExceptionsVariableName:
-  Exclude:
-    - 'lib/omniauth/strategies/cas/logout_request.rb'
-
 RSpec/AnyInstance:
   Exclude:
     - 'spec/omniauth/strategies/cas_spec.rb'
@@ -177,20 +113,6 @@ RSpec/VerifiedDoubles:
     - 'spec/omniauth/strategies/cas/service_ticket_validator_spec.rb'
     - 'spec/omniauth/strategies/cas_spec.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: prefer_alias, prefer_alias_method
-Style/Alias:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: is_a?, kind_of?
-Style/ClassCheck:
-  Exclude:
-    - 'lib/omniauth/strategies/cas/service_ticket_validator.rb'
-
 # Configuration parameters: AllowedConstants.
 Style/Documentation:
   Exclude:
@@ -200,11 +122,6 @@ Style/Documentation:
     - 'lib/omniauth/strategies/cas/logout_request.rb'
     - 'lib/omniauth/strategies/cas/service_ticket_validator.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-Style/EmptyLiteral:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: EnforcedStyle.
 # SupportedStyles: always, always_true, never
@@ -217,12 +134,6 @@ Style/FrozenStringLiteralComment:
     - 'lib/omniauth/strategies/cas/logout_request.rb'
     - 'lib/omniauth/strategies/cas/service_ticket_validator.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: MinBodyLength, AllowConsecutiveConditionals.
-Style/GuardClause:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: AllowedReceivers.
 # AllowedReceivers: Thread.current
@@ -230,11 +141,6 @@ Style/HashEachMethods:
   Exclude:
     - 'lib/omniauth/strategies/cas.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-Style/IfUnlessModifier:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: EnforcedStyle.
 # SupportedStyles: literals, strict
@@ -252,17 +158,6 @@ Style/NumericPredicate:
     - 'spec/**/*'
     - 'lib/omniauth/strategies/cas/service_ticket_validator.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-Style/ParallelAssignment:
-  Exclude:
-    - 'lib/omniauth/strategies/cas/logout_request.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: PreferredDelimiters.
-Style/PercentLiteralDelimiters:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: EnforcedStyle.
 # SupportedStyles: short, verbose
@@ -270,38 +165,6 @@ Style/PreferredHashMethods:
   Exclude:
     - 'lib/omniauth/strategies/cas.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-Style/Proc:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle, AllowedCompactTypes.
-# SupportedStyles: compact, exploded
-Style/RaiseArgs:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: AllowMultipleReturnValues.
-Style/RedundantReturn:
-  Exclude:
-    - 'lib/omniauth/strategies/cas/logout_request.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: implicit, explicit
-Style/RescueStandardError:
-  Exclude:
-    - 'lib/omniauth/strategies/cas/logout_request.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle, ConsistentQuotesInMultiline.
-# SupportedStyles: single_quotes, double_quotes
-Style/StringLiterals:
-  Exclude:
-    - 'lib/omniauth/strategies/cas.rb'
-
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, AllowedPatterns.
 # URISchemes: http, https
diff --git a/lib/omniauth/cas.rb b/lib/omniauth/cas.rb
index dab016a..2fe34bb 100644
--- a/lib/omniauth/cas.rb
+++ b/lib/omniauth/cas.rb
@@ -1,2 +1,2 @@
 require 'omniauth/cas/version'
-require 'omniauth/strategies/cas'
\ No newline at end of file
+require 'omniauth/strategies/cas'
diff --git a/lib/omniauth/strategies/cas.rb b/lib/omniauth/strategies/cas.rb
index 3b00a0b..e1db34a 100644
--- a/lib/omniauth/strategies/cas.rb
+++ b/lib/omniauth/strategies/cas.rb
@@ -14,7 +14,7 @@ class InvalidCASTicket < StandardError; end
       autoload :LogoutRequest, 'omniauth/strategies/cas/logout_request'
 
       attr_accessor :raw_info
-      alias_method :user_info, :raw_info
+      alias user_info raw_info
 
       option :name, :cas # Required property by OmniAuth::Strategy
 
@@ -26,7 +26,7 @@ class InvalidCASTicket < StandardError; end
       option :service_validate_url, '/serviceValidate'
       option :login_url,            '/login'
       option :logout_url,           '/logout'
-      option :on_single_sign_out,   Proc.new {}
+      option :on_single_sign_out,   proc {}
       # A Proc or lambda that returns a Hash of additional user info to be
       # merged with the info returned by the CAS server.
       #
@@ -35,7 +35,7 @@ class InvalidCASTicket < StandardError; end
       # @param [Hash] The user info for the Service Ticket returned by the CAS server
       #
       # @return [Hash] Extra user info
-      option :fetch_raw_info,       Proc.new { Hash.new }
+      option :fetch_raw_info,       proc { {} }
       # Make all the keys configurable with some defaults set here
       option :uid_field, 'user'
       option :name_key, 'name'
@@ -48,23 +48,23 @@ class InvalidCASTicket < StandardError; end
       option :phone_key, 'phone'
 
       # As required by https://github.com/intridea/omniauth/wiki/Auth-Hash-Schema
-      AuthHashSchemaKeys = %w{name email nickname first_name last_name location image phone}
+      AuthHashSchemaKeys = %w[name email nickname first_name last_name location image phone]
       info do
         prune!({
-          name: raw_info[options[:name_key].to_s],
-          email: raw_info[options[:email_key].to_s],
-          nickname: raw_info[options[:nickname_key].to_s],
-          first_name: raw_info[options[:first_name_key].to_s],
-          last_name: raw_info[options[:last_name_key].to_s],
-          location: raw_info[options[:location_key].to_s],
-          image: raw_info[options[:image_key].to_s],
-          phone: raw_info[options[:phone_key].to_s]
-        })
+                 name: raw_info[options[:name_key].to_s],
+                 email: raw_info[options[:email_key].to_s],
+                 nickname: raw_info[options[:nickname_key].to_s],
+                 first_name: raw_info[options[:first_name_key].to_s],
+                 last_name: raw_info[options[:last_name_key].to_s],
+                 location: raw_info[options[:location_key].to_s],
+                 image: raw_info[options[:image_key].to_s],
+                 phone: raw_info[options[:phone_key].to_s]
+               })
       end
 
       extra do
         prune!(
-          raw_info.delete_if{ |k,v| AuthHashSchemaKeys.include?(k) }
+          raw_info.delete_if { |k, _v| AuthHashSchemaKeys.include?(k) }
         )
       end
 
@@ -82,8 +82,10 @@ def callback_phase
         else
           @ticket = request.params['ticket']
           return fail!(:no_ticket, MissingCASTicket.new('No CAS Ticket')) unless @ticket
+
           fetch_raw_info(@ticket)
           return fail!(:invalid_ticket, InvalidCASTicket.new('Invalid CAS Ticket')) if raw_info.empty?
+
           super
         end
       end
@@ -97,7 +99,7 @@ def request_phase
             'Location' => login_url(service_url),
             'Content-Type' => 'text/plain'
           },
-          ["You are being redirected to CAS for sign-in."]
+          ['You are being redirected to CAS for sign-in.']
         ]
       end
 
@@ -136,9 +138,9 @@ def extract_url
       end
 
       def validate_cas_setup
-        if options.host.nil? || options.login_url.nil?
-          raise ArgumentError.new(":host and :login_url MUST be provided")
-        end
+        return unless options.host.nil? || options.login_url.nil?
+
+        raise ArgumentError, ':host and :login_url MUST be provided'
       end
 
       # Build a service-validation URL from +service+ and +ticket+.
@@ -154,9 +156,9 @@ def service_validate_url(service_url, ticket)
         service_url = Addressable::URI.parse(service_url)
         service_url.query_values = service_url.query_values.tap { |qs| qs.delete('ticket') }
         cas_url + append_params(options.service_validate_url, {
-          service: service_url.to_s,
-          ticket: ticket
-        })
+                                  service: service_url.to_s,
+                                  ticket: ticket
+                                })
       end
 
       # Build a CAS login URL from +service+.
@@ -175,7 +177,7 @@ def login_url(service)
       #
       # @return [String] the new joined URL.
       def append_params(base, params)
-        params = params.each { |k,v| v = Rack::Utils.escape(v) }
+        params = params.each { |_k, v| v = Rack::Utils.escape(v) }
         Addressable::URI.parse(base).tap do |base_uri|
           base_uri.query_values = (base_uri.query_values || {}).merge(params)
         end.to_s
@@ -187,14 +189,14 @@ def validate_service_ticket(ticket)
         ServiceTicketValidator.new(self, options, callback_url, ticket).call
       end
 
-    private
+      private
 
       def fetch_raw_info(ticket)
         validator = validate_service_ticket(ticket)
         ticket_user_info = validator.user_info
         ticket_success_body = validator.success_body
         custom_user_info = options.fetch_raw_info.call(self,
-          options, ticket, ticket_user_info, ticket_success_body)
+                                                       options, ticket, ticket_user_info, ticket_success_body)
         self.raw_info = ticket_user_info.merge(custom_user_info)
       end
 
diff --git a/lib/omniauth/strategies/cas/logout_request.rb b/lib/omniauth/strategies/cas/logout_request.rb
index eba676c..3448208 100644
--- a/lib/omniauth/strategies/cas/logout_request.rb
+++ b/lib/omniauth/strategies/cas/logout_request.rb
@@ -3,7 +3,8 @@ module Strategies
     class CAS
       class LogoutRequest
         def initialize(strategy, request)
-          @strategy, @request = strategy, request
+          @strategy = strategy
+          @request = request
         end
 
         def call(options = {})
@@ -11,10 +12,10 @@ def call(options = {})
 
           begin
             result = single_sign_out_callback.call(*logout_request)
-          rescue StandardError => err
-            return @strategy.fail! :logout_request, err
+          rescue StandardError => e
+            @strategy.fail! :logout_request, e
           else
-            result = [200,{},'OK'] if result == true || result.nil?
+            result = [200, {}, 'OK'] if result == true || result.nil?
           ensure
             return unless result
 
@@ -22,18 +23,18 @@ def call(options = {})
             # when Rack::Response#new wants [body,status,headers]? Additionally,
             # why does Rack::Response differ in argument order from the usual
             # Rack-like [status,headers,body] array?
-            return Rack::Response.new(result[2],result[0],result[1]).finish
+            return Rack::Response.new(result[2], result[0], result[1]).finish
           end
         end
 
-      private
+        private
 
         def logout_request
           @logout_request ||= begin
             saml = Nokogiri.parse(@request.params['logoutRequest'])
             name_id = saml.xpath('//saml:NameID').text
             sess_idx = saml.xpath('//samlp:SessionIndex').text
-            inject_params(name_id:name_id, session_index:sess_idx)
+            inject_params(name_id: name_id, session_index: sess_idx)
             @request
           end
         end
@@ -42,7 +43,7 @@ def inject_params(new_params)
           rack_input = @request.env['rack.input'].read
           params = Rack::Utils.parse_query(rack_input, '&').merge new_params
           @request.env['rack.input'] = StringIO.new(Rack::Utils.build_query(params))
-        rescue
+        rescue StandardError
           # A no-op intended to ensure that the ensure block is run
           raise
         ensure
diff --git a/lib/omniauth/strategies/cas/service_ticket_validator.rb b/lib/omniauth/strategies/cas/service_ticket_validator.rb
index c5d8d74..6b813fa 100644
--- a/lib/omniauth/strategies/cas/service_ticket_validator.rb
+++ b/lib/omniauth/strategies/cas/service_ticket_validator.rb
@@ -40,7 +40,7 @@ def user_info
           parse_user_info(@success_body)
         end
 
-      private
+        private
 
         # Merges attributes with multiple values into an array if support is
         # enabled (disabled by default)
@@ -56,10 +56,11 @@ def attribute_value(user_info, attribute, value)
         # returns nil if given nil
         def parse_user_info(node)
           return nil if node.nil?
+
           {}.tap do |hash|
             node.children.each do |e|
               node_name = e.name.sub(/^cas:/, '')
-              unless e.kind_of?(Nokogiri::XML::Text) || node_name == 'proxies'
+              unless e.is_a?(Nokogiri::XML::Text) || node_name == 'proxies'
                 # There are no child elements
                 if e.element_children.count == 0
                   hash[node_name] = attribute_value(hash, node_name, e.content)
@@ -82,6 +83,7 @@ def parse_user_info(node)
         # if the passed body is nil or if there is no such node.
         def find_authentication_success(body)
           return nil if body.nil? || body == ''
+
           begin
             doc = Nokogiri::XML(body)
             begin