diff --git a/.rubocop.yml b/.rubocop.yml
index 0e5d326b..6c4f976b 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,1176 +2,131 @@ AllCops:
   Exclude:
   - 'db/schema.rb'
   - 'vendor/**/*'
-  DisabledByDefault: true
+  DisabledByDefault: false
   TargetRubyVersion: 2.5
 
-Layout/AccessModifierIndentation:
-  EnforcedStyle: indent
-  SupportedStyles:
-  - outdent
-  - indent
-  IndentationWidth:
+# Gems within groups in the Gemfile should be alphabetically sorted.
+Bundler/OrderedGems:
+  Enabled: false
 
-Style/Alias:
-  EnforcedStyle: prefer_alias_method
-  SupportedStyles:
-  - prefer_alias
-  - prefer_alias_method
+# Checks if uses of quotes match the configured preference.
+Style/StringLiterals:
+  Enabled: false
 
-Layout/AlignHash:
-  EnforcedHashRocketStyle: key
-  EnforcedColonStyle: key
-  EnforcedLastArgumentHashStyle: ignore_implicit
-  SupportedLastArgumentHashStyles:
-  - always_inspect
-  - always_ignore
-  - ignore_implicit
-  - ignore_explicit
+# Document classes and non-namespace modules.
+Style/Documentation:
+  Enabled: false
 
-Layout/AlignParameters:
-  EnforcedStyle: with_fixed_indentation
-  SupportedStyles:
-  - with_first_parameter
-  - with_fixed_indentation
-  IndentationWidth:
+# Check for conditionals that can be replaced with guard clauses
+Style/GuardClause:
+  Enabled: false
 
-Style/AndOr:
-  EnforcedStyle: always
-  SupportedStyles:
-  - always
-  - conditionals
+# Checks the formatting of empty method definitions.
+Style/EmptyMethod:
+  Enabled: false
 
-Style/BarePercentLiterals:
-  EnforcedStyle: bare_percent
-  SupportedStyles:
-  - percent_q
-  - bare_percent
+# Checks for trailing comma in hash literals.
+Style/TrailingCommaInHashLiteral:
+  Enabled: false
 
-Style/BlockDelimiters:
-  EnforcedStyle: line_count_based
-  SupportedStyles:
-  - line_count_based
-  - semantic
-  - braces_for_chaining
-  ProceduralMethods:
-  - benchmark
-  - bm
-  - bmbm
-  - create
-  - each_with_object
-  - measure
-  - new
-  - realtime
-  - tap
-  - with_object
-  FunctionalMethods:
-  - let
-  - let!
-  - subject
-  - watch
-  IgnoredMethods:
-  - lambda
-  - proc
-  - it
+# Checks for trailing comma in argument lists.
+Style/TrailingCommaInArguments:
+  Enabled: false
 
-Style/BracesAroundHashParameters:
-  EnforcedStyle: no_braces
-  SupportedStyles:
-  - braces
-  - no_braces
-  - context_dependent
+# Checks that `include`, `extend` and `prepend` exists at the top level.
+Style/MixinUsage:
+  Enabled: false
 
-Layout/CaseIndentation:
-  EnforcedStyle: end
-  SupportedStyles:
-  - case
-  - end
-  IndentOneStep: false
-  IndentationWidth:
-
-Style/ClassAndModuleChildren:
-  EnforcedStyle: nested
-  SupportedStyles:
-  - nested
-  - compact
-
-Style/ClassCheck:
-  EnforcedStyle: is_a?
-  SupportedStyles:
-  - is_a?
-  - kind_of?
-
-Style/CommandLiteral:
-  EnforcedStyle: backticks
-  SupportedStyles:
-  - backticks
-  - percent_x
-  - mixed
-  AllowInnerBackticks: false
-
-Style/CommentAnnotation:
-  Keywords:
-  - TODO
-  - FIXME
-  - OPTIMIZE
-  - HACK
-  - REVIEW
-
-Style/ConditionalAssignment:
-  EnforcedStyle: assign_to_condition
-  SupportedStyles:
-  - assign_to_condition
-  - assign_inside_condition
-  SingleLineConditionsOnly: true
-
-Layout/DotPosition:
-  EnforcedStyle: leading
-  SupportedStyles:
-  - leading
-  - trailing
-
-Style/EmptyElse:
-  EnforcedStyle: both
-  SupportedStyles:
-  - empty
-  - nil
-  - both
-
-Layout/EmptyLineBetweenDefs:
-  AllowAdjacentOneLineDefs: false
-
-Layout/EmptyLinesAroundBlockBody:
-  EnforcedStyle: no_empty_lines
-  SupportedStyles:
-  - empty_lines
-  - no_empty_lines
-
-Layout/EmptyLinesAroundClassBody:
-  EnforcedStyle: no_empty_lines
-  SupportedStyles:
-  - empty_lines
-  - empty_lines_except_namespace
-  - no_empty_lines
-
-Layout/EmptyLinesAroundModuleBody:
-  EnforcedStyle: no_empty_lines
-  SupportedStyles:
-  - empty_lines
-  - empty_lines_except_namespace
-  - no_empty_lines
-
-Layout/ExtraSpacing:
-  AllowForAlignment: true
-  ForceEqualSignAlignment: false
-
-Naming/FileName:
-  Exclude: []
-  ExpectMatchingDefinition: false
-  Regex:
-  IgnoreExecutableScripts: true
-
-Layout/FirstParameterIndentation:
-  EnforcedStyle: consistent
-  SupportedStyles:
-  - consistent
-  - special_for_inner_method_call
-  - special_for_inner_method_call_in_parentheses
-  IndentationWidth:
-
-Style/For:
-  EnforcedStyle: each
-  SupportedStyles:
-  - for
-  - each
-
-Style/FormatString:
-  EnforcedStyle: format
-  SupportedStyles:
-  - format
-  - sprintf
-  - percent
-
-Style/FrozenStringLiteralComment:
-  Details: >-
-    Add `# frozen_string_literal: true` to the top of the file. Frozen string
-    literals will become the default in a future Ruby version, and we want to
-    make sure we're ready.
-  EnforcedStyle: when_needed
-  SupportedStyles:
-    - when_needed
-    - always
-    - never
-
-Style/GlobalVars:
-  AllowedVariables: []
-
-Style/HashSyntax:
-  EnforcedStyle: ruby19
-  SupportedStyles:
-  - ruby19
-  - hash_rockets
-  - no_mixed_keys
-  - ruby19_no_mixed_keys
-  UseHashRocketsWithSymbolValues: false
-  PreferHashRocketsForNonAlnumEndingSymbols: false
-
-Layout/IndentationConsistency:
-  EnforcedStyle: normal
-  SupportedStyles:
-  - normal
-  - rails
-
-Layout/IndentationWidth:
-  Width: 2
-
-Layout/IndentArray:
-  EnforcedStyle: consistent
-  SupportedStyles:
-  - special_inside_parentheses
-  - consistent
-  - align_brackets
-  IndentationWidth:
-
-Layout/IndentAssignment:
-  IndentationWidth:
-
-Layout/IndentHash:
-  EnforcedStyle: consistent
-  SupportedStyles:
-  - special_inside_parentheses
-  - consistent
-  - align_braces
-  IndentationWidth:
-
-Style/LambdaCall:
-  EnforcedStyle: call
-  SupportedStyles:
-  - call
-  - braces
-
-Style/Next:
-  EnforcedStyle: skip_modifier_ifs
-  MinBodyLength: 3
-  SupportedStyles:
-  - skip_modifier_ifs
-  - always
-
-Style/NonNilCheck:
-  IncludeSemanticChanges: false
-
-Style/MethodDefParentheses:
-  EnforcedStyle: require_parentheses
-  SupportedStyles:
-  - require_parentheses
-  - require_no_parentheses
-  - require_no_parentheses_except_multiline
-
-Naming/MethodName:
-  EnforcedStyle: snake_case
-  SupportedStyles:
-  - snake_case
-  - camelCase
-
-Layout/MultilineArrayBraceLayout:
-  EnforcedStyle: symmetrical
-  SupportedStyles:
-  - symmetrical
-  - new_line
-  - same_line
-
-Layout/MultilineHashBraceLayout:
-  EnforcedStyle: symmetrical
-  SupportedStyles:
-  - symmetrical
-  - new_line
-  - same_line
-
-Layout/MultilineMethodCallBraceLayout:
-  EnforcedStyle: symmetrical
-  SupportedStyles:
-  - symmetrical
-  - new_line
-  - same_line
-
-Layout/MultilineMethodCallIndentation:
-  EnforcedStyle: indented
-  SupportedStyles:
-  - aligned
-  - indented
-  - indented_relative_to_receiver
-  IndentationWidth: 2
-
-Layout/MultilineMethodDefinitionBraceLayout:
-  EnforcedStyle: symmetrical
-  SupportedStyles:
-  - symmetrical
-  - new_line
-  - same_line
-
-Style/NumericLiteralPrefix:
-  EnforcedOctalStyle: zero_only
-  SupportedOctalStyles:
-  - zero_with_o
-  - zero_only
-
-Style/ParenthesesAroundCondition:
-  AllowSafeAssignment: true
+# Use %i or %I for arrays of symbols.
+Style/SymbolArray:
+  Enabled: false
 
+# Use `%`-literal delimiters consistently
 Style/PercentLiteralDelimiters:
-  PreferredDelimiters:
-    '%': '()'
-    '%i': '()'
-    '%q': '()'
-    '%Q': '()'
-    '%r': '{}'
-    '%s': '()'
-    '%w': '()'
-    '%W': '()'
-    '%x': '()'
+  Enabled: false
 
-Style/PercentQLiterals:
-  EnforcedStyle: lower_case_q
-  SupportedStyles:
-  - lower_case_q
-  - upper_case_q
+# Only use if/unless modifiers on single line statements.
+Style/MultilineIfModifier:
+  Enabled: false
 
-Naming/PredicateName:
-  NamePrefix:
-  - is_
-  NamePrefixBlacklist:
-  - is_
-  NameWhitelist:
-  - is_a?
-  Exclude:
-  - 'spec/**/*'
+# Checks for trailing comma in array literals.
+Style/TrailingCommaInArrayLiteral:
+  Enabled: false
 
-Style/PreferredHashMethods:
-  EnforcedStyle: short
-  SupportedStyles:
-  - short
-  - verbose
+# Use `expand_path(__dir__)` instead of `expand_path('..', __FILE__)`.
+Style/ExpandPathArguments:
+  Enabled: false
 
-Style/RaiseArgs:
-  EnforcedStyle: exploded
-  SupportedStyles:
-  - compact
-  - exploded
+# Do not assign mutable objects to constants.
+Style/MutableConstant:
+  Enabled: false
 
-Style/RedundantReturn:
-  AllowMultipleReturnValues: false
+# Avoid rescuing without specifying an error class.
+Style/RescueStandardError:
+  Enabled: false
 
-Style/RegexpLiteral:
-  EnforcedStyle: mixed
-  SupportedStyles:
-  - slashes
-  - percent_r
-  - mixed
-  AllowInnerSlashes: false
+# Align the elements of a hash literal if they span more than one line.
+Layout/AlignHash:
+  Enabled: false
 
-Style/SafeNavigation:
-  ConvertCodeThatCanStartToReturnNil: false
-  Enabled: true
+# Align the parameters of a method definition if they span more than one line.
+Layout/AlignParameters:
+  Enabled: false
 
-Lint/SafeNavigationChain:
-  Enabled: true
+# Align ends corresponding to defs correctly.
+Layout/EndAlignment:
+  Enabled: false
 
-Style/Semicolon:
-  AllowAsExpressionSeparator: false
+# Align elses and elsifs correctly.
+Layout/ElseAlignment:
+  Enabled: false
 
-Style/SignalException:
-  EnforcedStyle: only_raise
-  SupportedStyles:
-  - only_raise
-  - only_fail
-  - semantic
+# Add empty line after guard clause.
+Layout/EmptyLineAfterGuardClause:
+  Enabled: false
 
-Style/SingleLineMethods:
-  AllowIfMethodIsEmpty: true
+# Align the arguments of a method call if they span more than one line.
+Layout/AlignArguments:
+  Enabled: false
 
-Layout/SpaceBeforeFirstArg:
-  AllowForAlignment: true
+#
+Layout/IndentationWidth:
+  Enabled: false
 
-Style/SpecialGlobalVars:
-  EnforcedStyle: use_english_names
-  SupportedStyles:
-  - use_perl_names
-  - use_english_names
+# Checks for ambiguous block association with method when param passed without parentheses.
+Lint/AmbiguousBlockAssociation:
+  Enabled: false
 
-Style/StabbyLambdaParentheses:
-  EnforcedStyle: require_parentheses
-  SupportedStyles:
-  - require_parentheses
-  - require_no_parentheses
+# Avoid long blocks with many lines.
+Metrics/BlockLength:
+  Enabled: false
 
-Style/StringLiteralsInInterpolation:
-  EnforcedStyle: single_quotes
-  SupportedStyles:
-  - single_quotes
-  - double_quotes
+# A complexity metric geared towards measuring complexity for a human reader.
+Metrics/PerceivedComplexity:
+  Max: 17
 
-Style/Strip:
-  Enabled: true
-
-Layout/SpaceAroundBlockParameters:
-  EnforcedStyleInsidePipes: no_space
-  SupportedStylesInsidePipes:
-  - space
-  - no_space
-
-Layout/SpaceAroundEqualsInParameterDefault:
-  EnforcedStyle: space
-  SupportedStyles:
-  - space
-  - no_space
-
-Layout/SpaceAroundOperators:
-  AllowForAlignment: true
-
-Layout/SpaceBeforeBlockBraces:
-  EnforcedStyle: space
-  EnforcedStyleForEmptyBraces: space
-  SupportedStyles:
-  - space
-  - no_space
-
-Layout/SpaceInsideBlockBraces:
-  EnforcedStyle: space
-  SupportedStyles:
-  - space
-  - no_space
-  EnforcedStyleForEmptyBraces: no_space
-  SpaceBeforeBlockParameters: true
-
-Layout/SpaceInsideHashLiteralBraces:
-  EnforcedStyle: space
-  EnforcedStyleForEmptyBraces: no_space
-  SupportedStyles:
-  - space
-  - no_space
-  - compact
-
-Layout/SpaceInsideStringInterpolation:
-  EnforcedStyle: no_space
-  SupportedStyles:
-  - space
-  - no_space
-
-Style/SymbolProc:
-  IgnoredMethods:
-  - respond_to
-  - define_method
-
-Style/TernaryParentheses:
-  EnforcedStyle: require_no_parentheses
-  SupportedStyles:
-  - require_parentheses
-  - require_no_parentheses
-  AllowSafeAssignment: true
-
-Layout/TrailingBlankLines:
-  EnforcedStyle: final_newline
-  SupportedStyles:
-  - final_newline
-  - final_blank_line
-
-Style/TrivialAccessors:
-  ExactNameMatch: true
-  AllowPredicates: true
-  AllowDSLWriters: false
-  IgnoreClassMethods: false
-  Whitelist:
-  - to_ary
-  - to_a
-  - to_c
-  - to_enum
-  - to_h
-  - to_hash
-  - to_i
-  - to_int
-  - to_io
-  - to_open
-  - to_path
-  - to_proc
-  - to_r
-  - to_regexp
-  - to_str
-  - to_s
-  - to_sym
-
-Naming/VariableName:
-  EnforcedStyle: snake_case
-  SupportedStyles:
-  - snake_case
-  - camelCase
-
-Style/WhileUntilModifier:
-  Enabled: true
-
-Style/WordArray:
-  EnforcedStyle: percent
-  SupportedStyles:
-  - percent
-  - brackets
-  MinSize: 0
-  WordRegex: !ruby/regexp /\A[\p{Word}\n\t]+\z/
-
-Metrics/BlockNesting:
-  Max: 3
+# Avoid classes longer than 100 lines of code.
+Metrics/ClassLength:
+  Enabled: false
 
+# Limit lines to 80 characters.
 Metrics/LineLength:
   Max: 120
-  AllowHeredoc: true
-  AllowURI: true
-  URISchemes:
-  - http
-  - https
-  IgnoreCopDirectives: false
-  IgnoredPatterns:
-  - '\A\s*(remote_)?test(_\w+)?\s.*(do|->)(\s|\Z)'
 
-Metrics/ParameterLists:
-  Max: 5
-  CountKeywordArgs: false
+# Avoid methods longer than 10 lines of code.
+Metrics/MethodLength:
+  Enabled: false
 
-Layout/BlockAlignment:
-  EnforcedStyleAlignWith: either
-  SupportedStylesAlignWith:
-  - either
-  - start_of_block
-  - start_of_line
+# A calculated magnitude based on number of assignments,
+# branches, and conditions.
+Metrics/AbcSize:
+  Max: 60
 
-Layout/EndAlignment:
-  EnforcedStyleAlignWith: variable
-  SupportedStylesAlignWith:
-  - keyword
-  - variable
-  - start_of_line
+# A complexity metric that is strongly correlated to the number
+# of test cases needed to validate a method.
+Metrics/CyclomaticComplexity:
+  Max: 17
 
-Layout/DefEndAlignment:
-  EnforcedStyleAlignWith: start_of_line
-  SupportedStylesAlignWith:
-  - start_of_line
-  - def
-
-Lint/InheritException:
-  EnforcedStyle: runtime_error
-  SupportedStyles:
-  - runtime_error
-  - standard_error
-
-Lint/UnusedBlockArgument:
-  IgnoreEmptyBlocks: true
-  AllowUnusedKeywordArguments: false
-
-Lint/UnusedMethodArgument:
-  AllowUnusedKeywordArguments: false
-  IgnoreEmptyMethods: true
-
-Performance/RedundantMerge:
-  MaxKeyValuePairs: 2
-
-Rails/ActionFilter:
-  EnforcedStyle: action
-  SupportedStyles:
-  - action
-  - filter
-  Include:
-  - app/controllers/**/*.rb
-
-Rails/Date:
-  EnforcedStyle: flexible
-  SupportedStyles:
-  - strict
-  - flexible
-
-Rails/DynamicFindBy:
-  Whitelist:
-  - find_by_sql
-
-Rails/Exit:
-  Include:
-  - app/**/*.rb
-  - config/**/*.rb
-  - lib/**/*.rb
-  Exclude:
-  - 'lib/**/*.rake'
-
-Rails/FindBy:
-  Include:
-  - app/models/**/*.rb
-
-Rails/FindEach:
-  Include:
-  - app/models/**/*.rb
-
-Rails/HasAndBelongsToMany:
-  Include:
-  - app/models/**/*.rb
-
-Rails/NotNullColumn:
-  Include:
-  - db/migrate/*.rb
-
-Rails/Output:
-  Include:
-  - app/**/*.rb
-  - config/**/*.rb
-  - db/**/*.rb
-  - lib/**/*.rb
-
-Rails/ReadWriteAttribute:
-  Include:
-  - app/models/**/*.rb
-
-Rails/RequestReferer:
-  EnforcedStyle: referer
-  SupportedStyles:
-  - referer
-  - referrer
-
-Rails/SafeNavigation:
-  ConvertTry: false
-
-Rails/ScopeArgs:
-  Include:
-  - app/models/**/*.rb
-
-Rails/TimeZone:
-  EnforcedStyle: flexible
-  SupportedStyles:
-  - strict
-  - flexible
-
-Rails/UniqBeforePluck:
-  EnforcedStyle: conservative
-  SupportedStyles:
-  - conservative
-  - aggressive
-
-Rails/Validation:
-  Include:
-  - app/models/**/*.rb
-
-Naming/AccessorMethodName:
-  Enabled: true
-
-Layout/AlignArray:
-  Enabled: true
-
-Style/ArrayJoin:
-  Enabled: true
-
-Naming/AsciiIdentifiers:
-  Enabled: true
-
-Style/Attr:
-  Enabled: true
-
-Style/BeginBlock:
-  Enabled: true
-
-Style/BlockComments:
-  Enabled: true
-
-Layout/BlockEndNewline:
-  Enabled: true
-
-Style/CaseEquality:
-  Enabled: true
-
-Style/CharacterLiteral:
-  Enabled: true
-
-Naming/ClassAndModuleCamelCase:
-  Enabled: true
-
-Style/ClassMethods:
-  Enabled: true
-
-Style/ClassVars:
-  Enabled: true
-
-Layout/ClosingParenthesisIndentation:
-  Enabled: true
-
-Style/ColonMethodCall:
-  Enabled: true
-
-Layout/CommentIndentation:
-  Enabled: true
-
-Naming/ConstantName:
-  Enabled: true
-
-Style/DefWithParentheses:
-  Enabled: true
-
-Style/EachForSimpleLoop:
-  Enabled: true
-
-Style/EachWithObject:
-  Enabled: true
-
-Layout/ElseAlignment:
-  Enabled: true
-
-Style/EmptyCaseCondition:
-  Enabled: true
-
-Layout/EmptyLines:
-  Enabled: true
-
-Layout/EmptyLinesAroundAccessModifier:
-  Enabled: true
-
-Layout/EmptyLinesAroundMethodBody:
-  Enabled: true
-
-Style/EmptyLiteral:
-  Enabled: true
-
-Style/EndBlock:
-  Enabled: true
-
-Layout/EndOfLine:
-  Enabled: true
-
-Style/EvenOdd:
-  Enabled: true
-
-Layout/InitialIndentation:
-  Enabled: true
-
-Style/FlipFlop:
-  Enabled: true
-
-Style/IfInsideElse:
-  Enabled: true
-
-Style/IfUnlessModifierOfIfUnless:
-  Enabled: true
-
-Style/IfWithSemicolon:
-  Enabled: true
-
-Style/IdenticalConditionalBranches:
-  Enabled: true
-
-Style/InfiniteLoop:
-  Enabled: true
-
-Layout/LeadingCommentSpace:
-  Enabled: true
-
-Style/LineEndConcatenation:
-  Enabled: true
-
-Style/MethodCallWithoutArgsParentheses:
-  Enabled: true
-
-Style/MethodMissingSuper:
-  Enabled: true
-
-Style/MissingRespondToMissing:
-  Enabled: true
-
-Style/MultilineBlockChain:
-  Enabled: true
-
-Layout/MultilineBlockLayout:
-  Enabled: true
-
-Style/MultilineIfThen:
-  Enabled: true
-
-Style/MultilineMemoization:
-  Enabled: true
-
-Style/MultilineTernaryOperator:
-  Enabled: true
-
-Style/NegatedIf:
-  Enabled: true
-
-Style/NegatedWhile:
-  Enabled: true
-
-Style/NestedModifier:
-  Enabled: true
-
-Style/NestedParenthesizedCalls:
-  Enabled: true
-
-Style/NestedTernaryOperator:
-  Enabled: true
-
-Style/NilComparison:
-  Enabled: true
-
-Style/Not:
-  Enabled: true
-
-Style/OneLineConditional:
-  Enabled: true
-
-Naming/BinaryOperatorParameterName:
-  Enabled: true
-
-Style/OptionalArguments:
-  Enabled: true
-
-Style/ParallelAssignment:
-  Enabled: true
-
-Style/PerlBackrefs:
-  Enabled: true
-
-Style/Proc:
-  Enabled: true
-
-Style/RedundantBegin:
-  Enabled: true
-
-Style/RedundantException:
-  Enabled: true
-
-Style/RedundantFreeze:
-  Enabled: true
-
-Style/RedundantParentheses:
-  Enabled: true
-
-Style/RedundantSelf:
-  Enabled: true
-
-Layout/RescueEnsureAlignment:
-  Enabled: true
-
-Style/RescueModifier:
-  Enabled: true
-
-Style/SelfAssignment:
-  Enabled: true
-
-Layout/SpaceAfterColon:
-  Enabled: true
-
-Layout/SpaceAfterComma:
-  Enabled: true
-
-Layout/SpaceAfterMethodName:
-  Enabled: true
-
-Layout/SpaceAfterNot:
-  Enabled: true
-
-Layout/SpaceAfterSemicolon:
-  Enabled: true
-
-Layout/SpaceBeforeComma:
-  Enabled: true
-
-Layout/SpaceBeforeComment:
-  Enabled: true
-
-Layout/SpaceBeforeSemicolon:
-  Enabled: true
-
-Layout/SpaceAroundKeyword:
-  Enabled: true
-
-Layout/SpaceInsideArrayPercentLiteral:
-  Enabled: true
-
-Layout/SpaceInsidePercentLiteralDelimiters:
-  Enabled: true
-
-Layout/SpaceInsideArrayLiteralBrackets:
-  Enabled: true
-
-Layout/SpaceInsideParens:
-  Enabled: true
-
-Layout/SpaceInsideRangeLiteral:
-  Enabled: true
-
-Style/SymbolLiteral:
-  Enabled: true
-
-Layout/Tab:
-  Enabled: true
-
-Layout/TrailingWhitespace:
-  Enabled: true
-
-Style/UnlessElse:
-  Enabled: true
-
-Style/UnneededCapitalW:
-  Enabled: true
-
-Style/UnneededInterpolation:
-  Enabled: true
-
-Style/UnneededPercentQ:
-  Enabled: true
-
-Style/VariableInterpolation:
-  Enabled: true
-
-Style/WhenThen:
-  Enabled: true
-
-Style/WhileUntilDo:
-  Enabled: true
-
-Style/ZeroLengthPredicate:
-  Enabled: true
-
-Layout/IndentHeredoc:
-  EnforcedStyle: squiggly
-
-Lint/AmbiguousOperator:
-  Enabled: true
-
-Lint/AmbiguousRegexpLiteral:
-  Enabled: true
-
-Lint/CircularArgumentReference:
-  Enabled: true
-
-Layout/ConditionPosition:
-  Enabled: true
-
-Lint/Debugger:
-  Enabled: true
-
-Lint/DeprecatedClassMethods:
-  Enabled: true
-
-Lint/DuplicateMethods:
-  Enabled: true
-
-Lint/DuplicatedKey:
-  Enabled: true
-
-Lint/EachWithObjectArgument:
-  Enabled: true
-
-Lint/ElseLayout:
-  Enabled: true
-
-Lint/EmptyEnsure:
-  Enabled: true
-
-Lint/EmptyInterpolation:
-  Enabled: true
-
-Lint/EndInMethod:
-  Enabled: true
-
-Lint/EnsureReturn:
-  Enabled: true
-
-Lint/FloatOutOfRange:
-  Enabled: true
-
-Lint/FormatParameterMismatch:
-  Enabled: true
-
-Lint/HandleExceptions:
-  Enabled: true
-
-Lint/ImplicitStringConcatenation:
-  Description: Checks for adjacent string literals on the same line, which could
-    better be represented as a single string literal.
-
-Lint/IneffectiveAccessModifier:
-  Description: Checks for attempts to use `private` or `protected` to set the visibility
-    of a class method, which does not work.
-
-Lint/LiteralAsCondition:
-  Enabled: true
-
-Lint/LiteralInInterpolation:
-  Enabled: true
-
-Lint/Loop:
-  Description: Use Kernel#loop with break rather than begin/end/until or begin/end/while
-    for post-loop tests.
-
-Lint/NestedMethodDefinition:
-  Enabled: true
-
-Lint/NextWithoutAccumulator:
-  Description: Do not omit the accumulator when calling `next` in a `reduce`/`inject`
-    block.
-
-Lint/NonLocalExitFromIterator:
-  Enabled: true
-
-Lint/ParenthesesAsGroupedExpression:
-  Enabled: true
-
-Lint/PercentStringArray:
-  Enabled: true
-
-Lint/PercentSymbolArray:
-  Enabled: true
-
-Lint/RandOne:
-  Description: Checks for `rand(1)` calls. Such calls always return `0` and most
-    likely a mistake.
-
-Lint/RequireParentheses:
-  Enabled: true
-
-Lint/RescueException:
-  Enabled: true
-
-Lint/ShadowedException:
-  Enabled: true
-
-Lint/ShadowingOuterLocalVariable:
-  Enabled: true
-
-Lint/StringConversionInInterpolation:
-  Enabled: true
-
-Lint/UnderscorePrefixedVariableName:
-  Enabled: true
-
-Lint/UnifiedInteger:
-  Enabled: true
-
-Lint/UnneededCopDisableDirective:
-  Enabled: true
-
-Lint/UnneededCopEnableDirective:
-  Enabled: true
-
-Lint/UnneededSplatExpansion:
-  Enabled: true
-
-Lint/UnreachableCode:
-  Enabled: true
-
-Lint/UselessAccessModifier:
-  ContextCreatingMethods: []
-
-Lint/UselessAssignment:
-  Enabled: true
-
-Lint/UselessComparison:
-  Enabled: true
-
-Lint/UselessElseWithoutRescue:
-  Enabled: true
-
-Lint/UselessSetterCall:
-  Enabled: true
-
-Lint/Void:
-  Enabled: true
-
-Performance/CaseWhenSplat:
-  Enabled: true
-
-Performance/Count:
-  SafeMode: true
-
-Performance/Detect:
-  SafeMode: true
-
-Performance/DoubleStartEndWith:
-  Enabled: true
-
-Performance/EndWith:
-  Enabled: true
-
-Performance/FixedSize:
-  Enabled: true
-
-Performance/FlatMap:
-  EnabledForFlattenWithoutParams: false
-
-Performance/RangeInclude:
-  Enabled: true
-
-Performance/RedundantBlockCall:
-  Enabled: true
-
-Performance/RedundantMatch:
-  Enabled: true
-
-Performance/RedundantSortBy:
-  Enabled: true
-
-Performance/ReverseEach:
-  Enabled: true
-
-Performance/Sample:
-  Enabled: true
-
-Performance/Size:
-  Enabled: true
-
-Performance/CompareWithBlock:
-  Enabled: true
-
-Performance/StartWith:
-  Enabled: true
-
-Performance/StringReplacement:
-  Enabled: true
-
-Rails/DelegateAllowBlank:
-  Enabled: true
-
-Rails/HttpPositionalArguments:
-  Include:
-  - spec/**/*
-  - test/**/*
-
-Rails/OutputSafety:
-  Enabled: true
-
-Rails/PluralizationGrammar:
-  Enabled: true
-
-Security/Eval:
-  Enabled: true
-
-Security/JSONLoad:
-  Enabled: true
-
-Security/Open:
-  Enabled: true
-
-Lint/BigDecimalNew:
-  Enabled: true
-
-Style/TrailingBodyOnClass:
-  Enabled: true
-
-Style/TrailingBodyOnModule:
-  Enabled: true
-
-Style/TrailingCommaInArrayLiteral:
-  EnforcedStyleForMultiline: comma
-  Enabled: true
-
-Style/TrailingCommaInHashLiteral:
-  EnforcedStyleForMultiline: comma
-  Enabled: true
-
-Layout/SpaceInsideReferenceBrackets:
-  EnforcedStyle: no_space
-  EnforcedStyleForEmptyBrackets: no_space
-  Enabled: true
-
-Style/ModuleFunction:
-  EnforcedStyle: extend_self
-
-Lint/OrderedMagicComments:
-  Enabled: true
+# Checks for method parameter names that contain capital letters, end in numbers, or do not meet a minimal length.
+Naming/UncommunicativeMethodParamName:
+  Enabled: false
diff --git a/Gemfile b/Gemfile
index 11f3692d..a58166de 100644
--- a/Gemfile
+++ b/Gemfile
@@ -76,7 +76,7 @@ group :production do
 end
 
 # Ruby linting.
-gem 'rubocop', '0.57.1'
+gem 'rubocop'
 
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
diff --git a/Gemfile.lock b/Gemfile.lock
index 3dba1598..db2fbd1f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -179,7 +179,6 @@ GEM
       ast (~> 2.4.0)
     pg (0.21.0)
     popper_js (1.14.5)
-    powerpack (0.1.2)
     public_suffix (3.0.3)
     puma (3.11.4)
     pyu-ruby-sasl (0.0.3.3)
@@ -244,14 +243,13 @@ GEM
       rspec-mocks (~> 3.7.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.1)
-    rubocop (0.57.1)
+    rubocop (0.68.1)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
-      parser (>= 2.5)
-      powerpack (~> 0.1)
+      parser (>= 2.5, != 2.5.1.1)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.0, >= 1.0.1)
+      unicode-display_width (>= 1.4.0, < 1.6)
     ruby-progressbar (1.10.0)
     rubyntlm (0.6.2)
     safe_yaml (1.0.4)
@@ -364,7 +362,7 @@ DEPENDENCIES
   redis (~> 3.0)
   remote_syslog_logger
   rspec-rails (~> 3.7)
-  rubocop (= 0.57.1)
+  rubocop
   sass-rails (~> 5.0)
   shoulda-matchers (~> 3.1)
   spring
diff --git a/app/controllers/password_resets_controller.rb b/app/controllers/password_resets_controller.rb
index caf978ef..4cf87adb 100644
--- a/app/controllers/password_resets_controller.rb
+++ b/app/controllers/password_resets_controller.rb
@@ -75,9 +75,7 @@ class PasswordResetsController < ApplicationController
 
   # Checks expiration of reset token.
   def check_expiration
-    if current_user.password_reset_expired?
-      redirect_to new_password_reset_url, alert: I18n.t("expired_reset_token")
-    end
+    redirect_to new_password_reset_url, alert: I18n.t("expired_reset_token") if current_user.password_reset_expired?
   end
 
   def reset_link
diff --git a/app/controllers/rooms_controller.rb b/app/controllers/rooms_controller.rb
index e7cfc477..17bc0f8d 100644
--- a/app/controllers/rooms_controller.rb
+++ b/app/controllers/rooms_controller.rb
@@ -144,8 +144,8 @@ class RoomsController < ApplicationController
 
     begin
       redirect_to @room.join_path(current_user.name, opts, current_user.uid)
-    rescue BigBlueButton::BigBlueButtonException => exc
-      redirect_to room_path, alert: I18n.t(exc.key.to_s.underscore, default: I18n.t("bigbluebutton_exception"))
+    rescue BigBlueButton::BigBlueButtonException => e
+      redirect_to room_path, alert: I18n.t(e.key.to_s.underscore, default: I18n.t("bigbluebutton_exception"))
     end
 
     # Notify users that the room has started.
@@ -192,7 +192,7 @@ class RoomsController < ApplicationController
 
   def create_room_settings_string(mute_res, client_res)
     room_settings = {}
-    room_settings["muteOnStart"] = mute_res == "1" ? true : false
+    room_settings["muteOnStart"] = mute_res == "1"
 
     if client_res.eql? "html5"
       room_settings["joinViaHtml5"] = true
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 09e14627..440a3c1f 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -84,8 +84,8 @@ module ApplicationHelper
     begin
       provider_info = retrieve_provider_info(@user_domain, 'api2', 'getUserGreenlightCredentials')
       provider_info['provider'] == 'greenlight'
-    rescue => ex
-      logger.info ex
+    rescue => e
+      logger.info e
       false
     end
   end
diff --git a/app/helpers/recordings_helper.rb b/app/helpers/recordings_helper.rb
index 51fee958..1775307d 100644
--- a/app/helpers/recordings_helper.rb
+++ b/app/helpers/recordings_helper.rb
@@ -31,7 +31,7 @@ module RecordingsHelper
     len = valid_playbacks.first[:length]
     if len > 60
       "#{(len / 60).to_i} hrs #{len % 60} mins"
-    elsif len == 0
+    elsif len.zero?
       "< 1 min"
     else
       "#{len} min"
diff --git a/app/helpers/sessions_helper.rb b/app/helpers/sessions_helper.rb
index 011742ad..9c76c731 100644
--- a/app/helpers/sessions_helper.rb
+++ b/app/helpers/sessions_helper.rb
@@ -60,22 +60,20 @@ module SessionsHelper
 
   def generate_checksum(user_domain, redirect_url, secret)
     string = user_domain + redirect_url + secret
-    OpenSSL::Digest.digest('sha1', string).unpack("H*").first
+    OpenSSL::Digest.digest('sha1', string).unpack1("H*")
   end
 
   def parse_user_domain(hostname)
     return hostname.split('.').first if Rails.configuration.url_host.empty?
     Rails.configuration.url_host.split(',').each do |url_host|
-      if hostname.include?(url_host)
-        return hostname.chomp(url_host).chomp('.')
-      end
+      return hostname.chomp(url_host).chomp('.') if hostname.include?(url_host)
     end
     ''
   end
 
   def omniauth_options(env)
     gl_redirect_url = (Rails.env.production? ? "https" : env["rack.url_scheme"]) + "://" + env["SERVER_NAME"] + ":" +
-        env["SERVER_PORT"]
+                      env["SERVER_PORT"]
     user_domain = parse_user_domain(env["SERVER_NAME"])
     env['omniauth.strategy'].options[:customer] = user_domain
     env['omniauth.strategy'].options[:gl_redirect_url] = gl_redirect_url
diff --git a/app/models/room.rb b/app/models/room.rb
index 72c756e4..5e01e2d7 100644
--- a/app/models/room.rb
+++ b/app/models/room.rb
@@ -67,9 +67,9 @@ class Room < ApplicationRecord
       unless meeting[:messageKey] == 'duplicateWarning'
         update_attributes(sessions: sessions + 1, last_session: DateTime.now)
       end
-    rescue BigBlueButton::BigBlueButtonException => exc
-      puts "BigBlueButton failed on create: #{exc.key}: #{exc.message}"
-      raise exc
+    rescue BigBlueButton::BigBlueButtonException => e
+      puts "BigBlueButton failed on create: #{e.key}: #{e.message}"
+      raise e
     end
   end
 
diff --git a/app/models/user.rb b/app/models/user.rb
index 21176374..7e446f80 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -225,7 +225,7 @@ class User < ApplicationRecord
 
   # Initializes a room for the user and assign a BigBlueButton user id.
   def initialize_main_room
-    self.uid = "gl-#{(0...12).map { (65 + rand(26)).chr }.join.downcase}"
+    self.uid = "gl-#{(0...12).map { rand(65..90).chr }.join.downcase}"
     self.main_room = Room.create!(owner: self, name: I18n.t("home_room"))
     save
   end
diff --git a/config/application.rb b/config/application.rb
index 8ddcc67b..d53284c0 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -101,6 +101,6 @@ module Greenlight
     config.room_features = ENV['ROOM_FEATURES'] || ""
 
     # The maximum number of rooms included in one bbbapi call
-    config.pagination_number = ENV['PAGINATION_NUMBER'].to_i == 0 ? 25 : ENV['PAGINATION_NUMBER'].to_i
+    config.pagination_number = ENV['PAGINATION_NUMBER'].to_i.zero? ? 25 : ENV['PAGINATION_NUMBER'].to_i
   end
 end
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 10743429..837327dc 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -113,7 +113,5 @@ Rails.application.configure do
   config.active_record.dump_schema_after_migration = false
 
   # Set the relative url root for deployment to a subdirectory.
-  if ENV['RELATIVE_URL_ROOT'] != "/"
-    config.relative_url_root = ENV['RELATIVE_URL_ROOT'] || "/b"
-  end
+  config.relative_url_root = ENV['RELATIVE_URL_ROOT'] || "/b" if ENV['RELATIVE_URL_ROOT'] != "/"
 end
diff --git a/lib/bbb_api.rb b/lib/bbb_api.rb
index 09c601ad..d6b12fd2 100644
--- a/lib/bbb_api.rb
+++ b/lib/bbb_api.rb
@@ -64,7 +64,7 @@ module BbbApi
   def encode_bbb_url(base_url, secret, params, route = 'getUser')
     encoded_params = params.to_param
     string = route + encoded_params + secret
-    checksum = OpenSSL::Digest.digest('sha1', string).unpack('H*').first
+    checksum = OpenSSL::Digest.digest('sha1', string).unpack1('H*')
 
     URI.parse("#{base_url}#{route}?#{encoded_params}&checksum=#{checksum}")
   end
diff --git a/lib/tasks/configuration.rake b/lib/tasks/configuration.rake
index ac36df0b..0e9573ee 100644
--- a/lib/tasks/configuration.rake
+++ b/lib/tasks/configuration.rake
@@ -12,9 +12,7 @@ namespace :conf do
     # Initial check that variables are set
     print "\nChecking environment"
     ENV_VARIABLES.each do |var|
-      if ENV[var].blank?
-        failed("#{var} not set correctly")
-      end
+      failed("#{var} not set correctly") if ENV[var].blank?
     end
     passed
 
@@ -48,8 +46,8 @@ def test_smtp
     ENV['SMTP_AUTH']) do |s|
     s.sendmail('test', ENV['SMTP_USERNAME'], 'notifications@example.com')
   end
-rescue => exc
-  failed("Error connecting to SMTP - #{exc}")
+rescue => e
+  failed("Error connecting to SMTP - #{e}")
 end
 
 # Takes the full URL including the protocol
@@ -58,11 +56,9 @@ def test_request(url)
   res = Net::HTTP.get(uri)
 
   doc = Nokogiri::XML(res)
-  if doc.css("returncode").text != "SUCCESS"
-    failed("Could not get a valid response from BigBlueButton server - #{res}")
-  end
-rescue => exc
-  failed("Error connecting to BigBlueButton server - #{exc}")
+  failed("Could not get a valid response from BigBlueButton server - #{res}") if doc.css("returncode").text != "SUCCESS"
+rescue => e
+  failed("Error connecting to BigBlueButton server - #{e}")
 end
 
 def failed(msg)
diff --git a/spec/models/room_spec.rb b/spec/models/room_spec.rb
index dfcc714b..d418b043 100644
--- a/spec/models/room_spec.rb
+++ b/spec/models/room_spec.rb
@@ -102,7 +102,7 @@ describe Room, type: :model do
       query = fullname + meeting_id + password
       checksum_string = "join#{query + secret}"
 
-      checksum = OpenSSL::Digest.digest('sha1', checksum_string).unpack("H*").first
+      checksum = OpenSSL::Digest.digest('sha1', checksum_string).unpack1("H*")
       expect(@room.join_path("Example")).to eql("#{endpoint}join?#{query}&checksum=#{checksum}")
     end
   end