diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index a91f2ae9..f14cfb99 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2017-07-14 12:03:16 +0000 using RuboCop version 0.49.1.
+# on 2017-11-27 22:40:12 +0530 using RuboCop version 0.51.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -46,7 +46,7 @@ Layout/EmptyLineAfterMagicComment:
   Exclude:
     - 'spec/models/conference_spec.rb'
 
-# Offense count: 104
+# Offense count: 109
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles.
 # SupportedStyles: empty_lines, no_empty_lines
@@ -151,7 +151,7 @@ Layout/MultilineHashBraceLayout:
 Layout/MultilineMethodCallBraceLayout:
   Enabled: false
 
-# Offense count: 55
+# Offense count: 53
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
 # SupportedStyles: aligned, indented, indented_relative_to_receiver
@@ -192,10 +192,11 @@ Layout/SpaceAroundOperators:
   Exclude:
     - 'lib/tasks/data.rake'
 
-# Offense count: 416
+# Offense count: 463
 # Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
+# Configuration parameters: EnforcedStyle, SupportedStyles, SupportedStylesForEmptyBraces.
 # SupportedStyles: space, no_space
+# SupportedStylesForEmptyBraces: space, no_space
 Layout/SpaceBeforeBlockBraces:
   Enabled: false
 
@@ -205,20 +206,13 @@ Layout/SpaceBeforeComma:
   Exclude:
     - 'lib/tasks/data_demo.rake'
 
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: AllowForAlignment.
-Layout/SpaceBeforeFirstArg:
-  Exclude:
-    - 'spec/controllers/admin/roles_controller_spec.rb'
-
 # Offense count: 1
 # Cop supports --auto-correct.
 Layout/SpaceBeforeSemicolon:
   Exclude:
     - 'Guardfile'
 
-# Offense count: 51
+# Offense count: 54
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles, EnforcedStyleForEmptyBraces, SupportedStylesForEmptyBraces, SpaceBeforeBlockParameters.
 # SupportedStyles: space, no_space
@@ -293,6 +287,13 @@ Lint/IneffectiveAccessModifier:
     - 'app/models/conference.rb'
 
 # Offense count: 2
+Lint/RescueWithoutErrorClass:
+  Exclude:
+    - 'app/controllers/users/omniauth_callbacks_controller.rb'
+    - 'lib/tasks/migrate_config.rake'
+
+# Offense count: 2
+# Cop supports --auto-correct.
 Lint/ScriptPermission:
   Exclude:
     - 'Guardfile'
@@ -305,49 +306,41 @@ Lint/UnusedBlockArgument:
   Exclude:
     - 'lib/tasks/user.rake'
 
-# Offense count: 114
+# Offense count: 136
 Metrics/AbcSize:
   Max: 86
 
-# Offense count: 233
+# Offense count: 258
 # Configuration parameters: CountComments, ExcludedMethods.
 Metrics/BlockLength:
   Max: 471
 
-# Offense count: 23
+# Offense count: 28
 Metrics/CyclomaticComplexity:
-  Max: 12
-  Exclude:
-    - 'app/models/track.rb'
+  Max: 14
 
-# Offense count: 2353
+# Offense count: 2774
 # Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
 # URISchemes: http, https
 Metrics/LineLength:
   Max: 619
 
-# Offense count: 120
+# Offense count: 133
 # Configuration parameters: CountComments.
 Metrics/MethodLength:
   Max: 56
-  Exclude:
-    - 'app/models/admin_ability.rb'
 
-# Offense count: 3
+# Offense count: 4
 # Configuration parameters: CountComments.
 Metrics/ModuleLength:
-  Max: 159
-  Exclude:
-    - 'app/helpers/format_helper.rb'
-
-# Offense count: 15
-Metrics/PerceivedComplexity:
-  Max: 16
-  Exclude:
-    - 'app/models/track.rb'
+  Max: 171
 
 # Offense count: 20
-Style/AccessorMethodName:
+Metrics/PerceivedComplexity:
+  Max: 16
+
+# Offense count: 20
+Naming/AccessorMethodName:
   Exclude:
     - 'app/controllers/admin/events_controller.rb'
     - 'app/controllers/application_controller.rb'
@@ -356,6 +349,51 @@ Style/AccessorMethodName:
     - 'app/models/target.rb'
     - 'app/models/user.rb'
 
+# Offense count: 2
+# Configuration parameters: ExpectMatchingDefinition, Regex, IgnoreExecutableScripts, AllowedAcronyms.
+# AllowedAcronyms: CLI, DSL, ACL, API, ASCII, CPU, CSS, DNS, EOF, GUID, HTML, HTTP, HTTPS, ID, IP, JSON, LHS, QPS, RAM, RHS, RPC, SLA, SMTP, SQL, SSH, TCP, TLS, TTL, UDP, UI, UID, UUID, URI, URL, UTF8, VM, XML, XMPP, XSRF, XSS
+Naming/FileName:
+  Exclude:
+    - 'Gemfile'
+    - 'Vagrantfile'
+
+# Offense count: 2
+# Configuration parameters: Blacklist.
+# Blacklist: END, (?-mix:EO[A-Z]{1})
+Naming/HeredocDelimiterNaming:
+  Exclude:
+    - 'spec/factories/users.rb'
+    - 'spec/models/user_spec.rb'
+
+# Offense count: 2
+# Configuration parameters: NamePrefix, NamePrefixBlacklist, NameWhitelist, MethodDefinitionMacros.
+# NamePrefix: is_, has_, have_
+# NamePrefixBlacklist: is_, has_, have_
+# NameWhitelist: is_a?
+# MethodDefinitionMacros: define_method, define_singleton_method
+Naming/PredicateName:
+  Exclude:
+    - 'spec/**/*'
+    - 'app/models/comment.rb'
+    - 'app/models/contact.rb'
+
+# Offense count: 2
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: snake_case, normalcase, non_integer
+Naming/VariableNumber:
+  Exclude:
+    - 'spec/models/ticket_purchase_spec.rb'
+
+# Offense count: 4
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect.
+Performance/HashEachMethods:
+  Exclude:
+    - 'app/controllers/admin/conferences_controller.rb'
+    - 'app/helpers/application_helper.rb'
+    - 'db/migrate/20140701123203_add_events_per_week_to_conference.rb'
+    - 'spec/factories/event_users.rb'
+
 # Offense count: 1
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles.
@@ -386,7 +424,14 @@ Style/ConditionalAssignment:
     - 'db/migrate/20140610165551_migrate_data_person_to_user.rb'
     - 'db/migrate/20140820124117_undo_wrong_migration20140801080705_add_users_to_events.rb'
 
-# Offense count: 464
+# Offense count: 9
+Style/DateTime:
+  Exclude:
+    - 'app/models/conference.rb'
+    - 'app/models/program.rb'
+    - 'spec/models/conference_spec.rb'
+
+# Offense count: 488
 Style/Documentation:
   Enabled: false
 
@@ -419,14 +464,13 @@ Style/EmptyMethod:
     - 'db/migrate/20130216122155_set_registration_defaults_to_false.rb'
 
 # Offense count: 2
-# Configuration parameters: ExpectMatchingDefinition, Regex, IgnoreExecutableScripts, AllowedAcronyms.
-# AllowedAcronyms: CLI, DSL, ACL, API, ASCII, CPU, CSS, DNS, EOF, GUID, HTML, HTTP, HTTPS, ID, IP, JSON, LHS, QPS, RAM, RHS, RPC, SLA, SMTP, SQL, SSH, TCP, TLS, TTL, UDP, UI, UID, UUID, URI, URL, UTF8, VM, XML, XMPP, XSRF, XSS
-Style/FileName:
+# Cop supports --auto-correct.
+Style/Encoding:
   Exclude:
-    - 'Gemfile'
-    - 'Vagrantfile'
+    - 'app/uploaders/picture_uploader.rb'
+    - 'spec/models/conference_spec.rb'
 
-# Offense count: 24
+# Offense count: 32
 # Configuration parameters: MinBodyLength.
 Style/GuardClause:
   Enabled: false
@@ -445,7 +489,6 @@ Style/HashSyntax:
 # Configuration parameters: MaxLineLength.
 Style/IfUnlessModifier:
   Exclude:
-    - 'app/controllers/admin/booths_controller.rb'
     - 'app/controllers/admin/events_controller.rb'
     - 'app/controllers/api/v1/events_controller.rb'
     - 'app/controllers/conference_registrations_controller.rb'
@@ -454,7 +497,6 @@ Style/IfUnlessModifier:
     - 'app/models/commercial.rb'
     - 'app/models/conference.rb'
     - 'app/models/email_settings.rb'
-    - 'app/models/ticket_purchase.rb'
     - 'app/models/user.rb'
     - 'db/migrate/20151031092713_change_conference_id_to_venue_id_in_rooms.rb'
     - 'lib/tasks/events_registrations.rake'
@@ -469,7 +511,7 @@ Style/LineEndConcatenation:
     - 'spec/features/conference_spec.rb'
     - 'spec/features/registration_periods_spec.rb'
 
-# Offense count: 6
+# Offense count: 9
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles.
 # SupportedStyles: require_parentheses, require_no_parentheses, require_no_parentheses_except_multiline
@@ -498,12 +540,14 @@ Style/MutableConstant:
 
 # Offense count: 4
 # Cop supports --auto-correct.
+# Configuration parameters: Whitelist.
+# Whitelist: be, be_a, be_an, be_between, be_falsey, be_kind_of, be_instance_of, be_truthy, be_within, eq, eql, end_with, include, match, raise_error, respond_to, start_with
 Style/NestedParenthesizedCalls:
   Exclude:
     - 'spec/features/conference_spec.rb'
     - 'spec/models/conference_spec.rb'
 
-# Offense count: 26
+# Offense count: 27
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, MinBodyLength, SupportedStyles.
 # SupportedStyles: skip_modifier_ifs, always
@@ -548,6 +592,12 @@ Style/OptionalArguments:
   Exclude:
     - 'app/models/event.rb'
 
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/OrAssignment:
+  Exclude:
+    - 'app/controllers/schedules_controller.rb'
+
 # Offense count: 3
 # Cop supports --auto-correct.
 # Configuration parameters: AllowSafeAssignment.
@@ -557,7 +607,7 @@ Style/ParenthesesAroundCondition:
     - 'app/controllers/application_controller.rb'
     - 'app/helpers/format_helper.rb'
 
-# Offense count: 14
+# Offense count: 15
 # Cop supports --auto-correct.
 # Configuration parameters: PreferredDelimiters.
 Style/PercentLiteralDelimiters:
@@ -571,20 +621,9 @@ Style/PercentLiteralDelimiters:
     - 'app/models/contact.rb'
     - 'app/models/registration.rb'
     - 'app/models/subscription.rb'
+    - 'app/models/track.rb'
     - 'app/uploaders/picture_uploader.rb'
     - 'spec/models/program_spec.rb'
-    - 'app/models/track.rb'
-
-# Offense count: 2
-# Configuration parameters: NamePrefix, NamePrefixBlacklist, NameWhitelist.
-# NamePrefix: is_, has_, have_
-# NamePrefixBlacklist: is_, has_, have_
-# NameWhitelist: is_a?
-Style/PredicateName:
-  Exclude:
-    - 'spec/**/*'
-    - 'app/models/comment.rb'
-    - 'app/models/contact.rb'
 
 # Offense count: 1
 # Cop supports --auto-correct.
@@ -662,7 +701,7 @@ Style/StringLiteralsInInterpolation:
   Exclude:
     - 'lib/tasks/dump_db.rake'
 
-# Offense count: 73
+# Offense count: 79
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, MinSize, SupportedStyles.
 # SupportedStyles: percent, brackets
@@ -708,10 +747,3 @@ Style/UnneededInterpolation:
   Exclude:
     - 'app/helpers/format_helper.rb'
     - 'spec/controllers/admin/conferences_controller_spec.rb'
-
-# Offense count: 2
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: snake_case, normalcase, non_integer
-Style/VariableNumber:
-  Exclude:
-    - 'spec/models/ticket_purchase_spec.rb'