diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..4d54c75
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,55 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+# This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
+# For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
+
+name: ci
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        gemfile: ['rails_7.1', 'rails_7.0']
+        ruby: [3.3, 3.2, 3.1]
+        include:
+          - gemfile: rails_7.1
+            ruby: '3.0'
+          - gemfile: rails_7.1
+            ruby: 2.7
+          - gemfile: rails_7.0
+            ruby: '3.0'
+          - gemfile: rails_7.0
+            ruby: 2.7
+          - gemfile: rails_6.1
+            ruby: 2.7
+          - gemfile: rails_6.0
+            ruby: 2.7
+          - gemfile: rails_5.2
+            ruby: 2.7
+          - gemfile: rails_5.1
+            ruby: 2.7
+          - gemfile: rails_5.0
+            ruby: 2.7
+
+    env:
+      BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
+      CI: true
+      COVERALLS_REPO_TOKEN: 3PVU3qEEgaWdwemUGBjnbYwv87BPTti9u
+    steps:
+    - uses: actions/checkout@v2
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true
+    - name: RSpec and Rubocop
+      run: |
+        bundle exec rubocop -c .rubocop.yml
+        bundle exec rspec
diff --git a/.rubocop.hound.yml b/.rubocop.hound.yml
deleted file mode 100644
index 0a94997..0000000
--- a/.rubocop.hound.yml
+++ /dev/null
@@ -1,261 +0,0 @@
-# this is the default from hound's github, do not modify
-AllCops:
-  Exclude:
-    - db/schema.rb
-
-AccessorMethodName:
-  Enabled: false
-
-ActionFilter:
-  Enabled: false
-
-Alias:
-  Enabled: false
-
-ArrayJoin:
-  Enabled: false
-
-AsciiComments:
-  Enabled: false
-
-AsciiIdentifiers:
-  Enabled: false
-
-Attr:
-  Enabled: false
-
-BlockNesting:
-  Enabled: false
-
-CaseEquality:
-  Enabled: false
-
-CharacterLiteral:
-  Enabled: false
-
-ClassAndModuleChildren:
-  Enabled: false
-
-ClassLength:
-  Enabled: false
-
-ClassVars:
-  Enabled: false
-
-CollectionMethods:
-  PreferredMethods:
-    find: detect
-    reduce: inject
-    collect: map
-    find_all: select
-
-ColonMethodCall:
-  Enabled: false
-
-CommentAnnotation:
-  Enabled: false
-
-CyclomaticComplexity:
-  Enabled: false
-
-Delegate:
-  Enabled: false
-
-DeprecatedHashMethods:
-  Enabled: false
-
-Documentation:
-  Enabled: false
-
-DotPosition:
-  EnforcedStyle: trailing
-
-DoubleNegation:
-  Enabled: false
-
-EachWithObject:
-  Enabled: false
-
-EmptyLiteral:
-  Enabled: false
-
-Encoding:
-  Enabled: false
-
-EvenOdd:
-  Enabled: false
-
-FileName:
-  Enabled: false
-
-FlipFlop:
-  Enabled: false
-
-FormatString:
-  Enabled: false
-
-GlobalVars:
-  Enabled: false
-
-GuardClause:
-  Enabled: false
-
-IfUnlessModifier:
-  Enabled: false
-
-IfWithSemicolon:
-  Enabled: false
-
-InlineComment:
-  Enabled: false
-
-Lambda:
-  Enabled: false
-
-LambdaCall:
-  Enabled: false
-
-LineEndConcatenation:
-  Enabled: false
-
-LineLength:
-  Max: 120
-  AllowURI: true
-
-MethodLength:
-  Enabled: false
-
-ModuleFunction:
-  Enabled: false
-
-NegatedIf:
-  Enabled: false
-
-NegatedWhile:
-  Enabled: false
-
-Next:
-  Enabled: false
-
-NilComparison:
-  Enabled: false
-
-Not:
-  Enabled: false
-
-NumericLiterals:
-  Enabled: false
-
-OneLineConditional:
-  Enabled: false
-
-OpMethod:
-  Enabled: false
-
-ParameterLists:
-  Enabled: false
-
-PercentLiteralDelimiters:
-  Enabled: false
-
-PerlBackrefs:
-  Enabled: false
-
-PredicateName:
-  NamePrefixBlacklist:
-    - is_
-
-Proc:
-  Enabled: false
-
-RaiseArgs:
-  Enabled: false
-
-RegexpLiteral:
-  Enabled: false
-
-SelfAssignment:
-  Enabled: false
-
-SingleLineBlockParams:
-  Enabled: false
-
-SingleLineMethods:
-  Enabled: false
-
-SignalException:
-  Enabled: false
-
-SpecialGlobalVars:
-  Enabled: false
-
-StringLiterals:
-  EnforcedStyle: double_quotes
-
-VariableInterpolation:
-  Enabled: false
-
-TrailingComma:
-  Enabled: false
-
-TrivialAccessors:
-  Enabled: false
-
-VariableInterpolation:
-  Enabled: false
-
-WhenThen:
-  Enabled: false
-
-WhileUntilModifier:
-  Enabled: false
-
-WordArray:
-  Enabled: false
-
-# Lint
-
-AmbiguousOperator:
-  Enabled: false
-
-AmbiguousRegexpLiteral:
-  Enabled: false
-
-AssignmentInCondition:
-  Enabled: false
-
-ConditionPosition:
-  Enabled: false
-
-DeprecatedClassMethods:
-  Enabled: false
-
-ElseLayout:
-  Enabled: false
-
-HandleExceptions:
-  Enabled: false
-
-InvalidCharacterLiteral:
-  Enabled: false
-
-LiteralInCondition:
-  Enabled: false
-
-LiteralInInterpolation:
-  Enabled: false
-
-Loop:
-  Enabled: false
-
-ParenthesesAsGroupedExpression:
-  Enabled: false
-
-RequireParentheses:
-  Enabled: false
-
-UnderscorePrefixedVariableName:
-  Enabled: false
-
-Void:
-  Enabled: false
diff --git a/.rubocop.yml b/.rubocop.yml
index 222945a..8cc6a71 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,19 +1,16 @@
-inherit_from:
- - .rubocop.hound.yml
+inherit_from: .rubocop_todo.yml
 
 AllCops:
-  TargetRubyVersion: 2.1
-  Exclude:
-    - '*.gemspec'
-    - 'Gemfile'
+  NewCops: enable
+  TargetRubyVersion: 2.7
 
-Style/EmptyLinesAroundClassBody:
+Layout/EmptyLinesAroundClassBody:
   Enabled: false
 
-Style/EmptyLinesAroundModuleBody:
+Layout/EmptyLinesAroundModuleBody:
   Enabled: false
 
-Style/EmptyLinesAroundMethodBody:
+Layout/EmptyLinesAroundMethodBody:
   Enabled: false
 
 Style/ClassCheck:
@@ -23,7 +20,7 @@ Style/ClassCheck:
 Style/StringLiterals:
   Enabled: false
 
-Style/FileName:
+Naming/FileName:
   Enabled: false
 
 Style/RedundantException:
@@ -35,19 +32,11 @@ Style/SignalException:
 Style/BlockDelimiters:
   Enabled: false
 
-Style/CollectionMethods:
-  PreferredMethods:
-    detect: find
-
 # Github's PR width is 120 characters
-Metrics/LineLength:
+Layout/LineLength:
   Max: 120
   AllowURI: true
 
-# Align with the style guide, we don't prefer anything
-Style/CollectionMethods:
-  Enabled: false
-
 Metrics/AbcSize:
   Description: A calculated magnitude based on number of assignments, branches, and
     conditions.
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..e5dba3f
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,284 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config --exclude-limit 250`
+# on 2023-10-30 06:15:37 UTC using RuboCop version 1.57.2.
+# 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
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: TreatCommentsAsGroupSeparators, ConsiderPunctuation, Include.
+# Include: **/*.gemfile, **/Gemfile, **/gems.rb
+Bundler/OrderedGems:
+  Exclude:
+    - 'gemfiles/rails_7.1.gemfile'
+
+# Offense count: 9
+# Configuration parameters: EnforcedStyle, AllowedGems, Include.
+# SupportedStyles: Gemfile, gems.rb, gemspec
+# Include: **/*.gemspec, **/Gemfile, **/gems.rb
+Gemspec/DevelopmentDependencies:
+  Exclude:
+    - 'ph_model.gemspec'
+
+# Offense count: 6
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: TreatCommentsAsGroupSeparators, ConsiderPunctuation, Include.
+# Include: **/*.gemspec
+Gemspec/OrderedDependencies:
+  Exclude:
+    - 'ph_model.gemspec'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: Severity, Include.
+# Include: **/*.gemspec
+Gemspec/RequireMFA:
+  Exclude:
+    - 'ph_model.gemspec'
+
+# Offense count: 1
+# Configuration parameters: Severity, Include.
+# Include: **/*.gemspec
+Gemspec/RequiredRubyVersion:
+  Exclude:
+    - 'ph_model.gemspec'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+Layout/EmptyLineAfterGuardClause:
+  Exclude:
+    - 'lib/ph_model/concerns/attribute_nested_validation.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+Layout/EmptyLineAfterMagicComment:
+  Exclude:
+    - 'lib/ph_model/version.rb'
+
+# Offense count: 2
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: space, no_space
+Layout/LineContinuationSpacing:
+  Exclude:
+    - 'spec/active_model/validations/collection_items_validator_spec.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: aligned, indented
+Layout/LineEndStringConcatenationIndentation:
+  Exclude:
+    - 'spec/active_model/validations/collection_items_validator_spec.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: aligned, indented
+Layout/MultilineOperationIndentation:
+  Exclude:
+    - 'lib/ph_model/concerns/attribute_nested_validation.rb'
+
+# Offense count: 2
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: require_no_space, require_space
+Layout/SpaceInLambdaLiteral:
+  Exclude:
+    - 'lib/active_model/validations/collection_items_validator/array_attribute_reader.rb'
+    - 'spec/active_model/validations/collection_items_validator/array_attribute_getter_spec.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: IgnoreEmptyBlocks, AllowUnusedKeywordArguments.
+Lint/UnusedBlockArgument:
+  Exclude:
+    - 'lib/ph_model.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowUnusedKeywordArguments, IgnoreEmptyMethods, IgnoreNotImplementedMethods.
+Lint/UnusedMethodArgument:
+  Exclude:
+    - 'lib/ph_model/concerns/attribute_nested_validation.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: CheckForMethodsWithNoSideEffects.
+Lint/Void:
+  Exclude:
+    - 'lib/ph_model.rb'
+
+# Offense count: 3
+# Configuration parameters: CountComments, CountAsOne, AllowedMethods, AllowedPatterns.
+# AllowedMethods: refine
+Metrics/BlockLength:
+  Max: 61
+
+# Offense count: 2
+# Configuration parameters: AllowedMethods, AllowedPatterns.
+Metrics/CyclomaticComplexity:
+  Max: 9
+
+# Offense count: 2
+# Configuration parameters: CountComments, CountAsOne, AllowedMethods, AllowedPatterns.
+Metrics/MethodLength:
+  Max: 23
+
+# Offense count: 1
+# Configuration parameters: AllowedMethods, AllowedPatterns.
+Metrics/PerceivedComplexity:
+  Max: 11
+
+# Offense count: 3
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: nested, compact
+Style/ClassAndModuleChildren:
+  Exclude:
+    - 'lib/active_model/validations/collection_items_validator/array_attribute_getter.rb'
+    - 'lib/active_model/validations/collection_items_validator/array_attribute_reader.rb'
+    - 'lib/active_model/validations/collection_items_validator/inner_validator_builder.rb'
+
+# Offense count: 5
+# Configuration parameters: AllowedConstants.
+Style/Documentation:
+  Exclude:
+    - 'spec/**/*'
+    - 'test/**/*'
+    - 'lib/ph_model.rb'
+    - 'lib/ph_model/concerns.rb'
+    - 'lib/ph_model/concerns/attribute_nested_validation.rb'
+    - 'lib/ph_model/concerns/attribute_of_array_type_initialization.rb'
+    - 'lib/ph_model/concerns/attribute_required_validation.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+Style/Encoding:
+  Exclude:
+    - 'ph_model.gemspec'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+Style/ExpandPathArguments:
+  Exclude:
+    - 'ph_model.gemspec'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+Style/FileWrite:
+  Exclude:
+    - 'Rakefile'
+
+# Offense count: 23
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, always_true, never
+Style/FrozenStringLiteralComment:
+  Exclude:
+    - 'Gemfile'
+    - 'Rakefile'
+    - 'lib/active_model/validations/collection_items_validator.rb'
+    - 'lib/active_model/validations/collection_items_validator/array_attribute_getter.rb'
+    - 'lib/active_model/validations/collection_items_validator/array_attribute_reader.rb'
+    - 'lib/active_model/validations/collection_items_validator/inner_validator_builder.rb'
+    - 'lib/active_model/validations/type_validator.rb'
+    - 'lib/ph_model.rb'
+    - 'lib/ph_model/concerns.rb'
+    - 'lib/ph_model/concerns/attribute_nested_validation.rb'
+    - 'lib/ph_model/concerns/attribute_of_array_type_initialization.rb'
+    - 'lib/ph_model/concerns/attribute_required_validation.rb'
+    - 'lib/ph_model/concerns/attribute_type_validation.rb'
+    - 'lib/ph_model/concerns/initialize_callback.rb'
+    - 'lib/ph_model/concerns/validated_factory.rb'
+    - 'lib/ph_model/validation_failed.rb'
+    - 'ph_model.gemspec'
+    - 'spec/active_model/validations/collection_items_validator/array_attribute_getter_spec.rb'
+    - 'spec/active_model/validations/collection_items_validator/inner_validator_builder_spec.rb'
+    - 'spec/active_model/validations/collection_items_validator_spec.rb'
+    - 'spec/active_model/validations/type_validator_spec.rb'
+    - 'spec/model_spec.rb'
+    - 'spec/spec_helper.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: MinBodyLength, AllowConsecutiveConditionals.
+Style/GuardClause:
+  Exclude:
+    - 'lib/active_model/validations/type_validator.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowIfModifier.
+Style/IfInsideElse:
+  Exclude:
+    - 'lib/ph_model/concerns/attribute_type_validation.rb'
+
+# Offense count: 2
+# This cop supports safe autocorrection (--autocorrect).
+Style/IfUnlessModifier:
+  Exclude:
+    - 'lib/ph_model/concerns/attribute_required_validation.rb'
+    - 'lib/ph_model/concerns/validated_factory.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+Style/MultilineIfModifier:
+  Exclude:
+    - 'lib/ph_model.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: PreferredDelimiters.
+Style/PercentLiteralDelimiters:
+  Exclude:
+    - 'Rakefile'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: .
+# SupportedStyles: same_as_string_literals, single_quotes, double_quotes
+Style/QuotedSymbols:
+  EnforcedStyle: double_quotes
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+Style/RedundantFreeze:
+  Exclude:
+    - 'lib/ph_model/version.rb'
+
+# Offense count: 2
+# This cop supports safe autocorrection (--autocorrect).
+Style/RedundantSelf:
+  Exclude:
+    - 'lib/ph_model.rb'
+
+# Offense count: 1
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: ConvertCodeThatCanStartToReturnNil, AllowedMethods, MaxChainLength.
+# AllowedMethods: present?, blank?, presence, try, try!
+Style/SafeNavigation:
+  Exclude:
+    - 'lib/ph_model.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowModifier.
+Style/SoleNestedConditional:
+  Exclude:
+    - 'lib/ph_model/concerns/attribute_of_array_type_initialization.rb'
+
+# Offense count: 2
+# This cop supports safe autocorrection (--autocorrect).
+Style/StderrPuts:
+  Exclude:
+    - 'Rakefile'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: MinSize.
+# SupportedStyles: percent, brackets
+Style/SymbolArray:
+  EnforcedStyle: brackets
diff --git a/gemfiles/rails_5.0.gemfile b/gemfiles/rails_5.0.gemfile
new file mode 100644
index 0000000..1ea8295
--- /dev/null
+++ b/gemfiles/rails_5.0.gemfile
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "rails", "~> 5.0.7"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_5.1.gemfile b/gemfiles/rails_5.1.gemfile
new file mode 100644
index 0000000..525f0e0
--- /dev/null
+++ b/gemfiles/rails_5.1.gemfile
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "rails", "~> 5.1.7"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_5.2.gemfile b/gemfiles/rails_5.2.gemfile
new file mode 100644
index 0000000..da8403a
--- /dev/null
+++ b/gemfiles/rails_5.2.gemfile
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "rails", "~> 5.2.6"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_6.0.gemfile b/gemfiles/rails_6.0.gemfile
new file mode 100644
index 0000000..12bfdb7
--- /dev/null
+++ b/gemfiles/rails_6.0.gemfile
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "rails", "~> 6.0.4"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_6.1.gemfile b/gemfiles/rails_6.1.gemfile
new file mode 100644
index 0000000..72e5a47
--- /dev/null
+++ b/gemfiles/rails_6.1.gemfile
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "minitest"
+gem "rails", "~> 6.1.4"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7.0.gemfile b/gemfiles/rails_7.0.gemfile
new file mode 100644
index 0000000..4ff9fd5
--- /dev/null
+++ b/gemfiles/rails_7.0.gemfile
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "rails", "~> 7.0.2"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7.1.gemfile b/gemfiles/rails_7.1.gemfile
new file mode 100644
index 0000000..8cdff14
--- /dev/null
+++ b/gemfiles/rails_7.1.gemfile
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "rails", "~> 7.1.1"
+gem "active_attr", git: "https://github.com/mathieujobin/active_attr", branch: "rails-7.1-support"
+
+gemspec path: "../"
diff --git a/lib/active_model/validations/collection_items_validator/inner_validator_builder.rb b/lib/active_model/validations/collection_items_validator/inner_validator_builder.rb
index bb09969..b031d7b 100644
--- a/lib/active_model/validations/collection_items_validator/inner_validator_builder.rb
+++ b/lib/active_model/validations/collection_items_validator/inner_validator_builder.rb
@@ -14,7 +14,7 @@ def initialize(validator_name, options)
       end
 
       def build
-        validator_class.new inner_options.merge(attributes: [:base])
+        validator_class.new(**inner_options.merge(attributes: [:base]))
       end
 
       private
diff --git a/lib/ph_model.rb b/lib/ph_model.rb
index e9faacc..54e79d7 100644
--- a/lib/ph_model.rb
+++ b/lib/ph_model.rb
@@ -40,8 +40,8 @@ def as_json(*)
   end
 
   def inspect
-    attr_info = self.class.attributes.map { |attr_name, info| "#{attr_name}: #{self.send(attr_name).inspect}" }.join(", ")
-    "#<#{self.model_name} #{attr_info}>"
+    attr_info = self.class.attributes.map { |attr_name, info| "#{attr_name}: #{self.send(attr_name).inspect}" }
+    "#<#{self.model_name} #{attr_info.join(', ')}>"
   end
 
   # Monkey patch #assign_attributes inside ActiveAttr::MassAssignment
diff --git a/lib/ph_model/version.rb b/lib/ph_model/version.rb
index 4343d28..714f492 100644
--- a/lib/ph_model/version.rb
+++ b/lib/ph_model/version.rb
@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 module PhModel
-  VERSION = '1.1.3'.freeze
+  VERSION = '1.2.0'.freeze
 end
diff --git a/ph_model.gemspec b/ph_model.gemspec
index 9b93221..a16dafc 100644
--- a/ph_model.gemspec
+++ b/ph_model.gemspec
@@ -18,19 +18,19 @@ Gem::Specification.new do |gem|
   gem.executables = gem.files.grep(%r{^bin/}).map { |f| File.basename(f) }
   gem.require_paths = ['lib']
 
-  gem.add_runtime_dependency 'activesupport', '> 3.2'
-  gem.add_runtime_dependency 'activemodel', '> 3.2'
-  gem.add_runtime_dependency 'active_attr', '~> 0.8'
+  gem.add_runtime_dependency 'activesupport', '> 5.0'
+  gem.add_runtime_dependency 'activemodel', '> 5.0'
+  gem.add_runtime_dependency 'active_attr', '~> 0.15' # 0.16 for rails 7.1
 
   gem.add_development_dependency 'faraday'
-  gem.add_development_dependency 'bundler', '~> 1.0'
-  gem.add_development_dependency 'rake', '~> 10.0'
+  gem.add_development_dependency 'bundler', '> 2.2'
+  gem.add_development_dependency 'rake', '> 10.0'
   gem.add_development_dependency 'rspec', '~> 3.0'
   gem.add_development_dependency 'rubygems-tasks', '~> 0.2'
   gem.add_development_dependency 'pry', '> 0'
   gem.add_development_dependency 'github_changelog_generator', '~> 1.6'
 
   # static analysis gems
-  gem.add_development_dependency 'rubocop', '~> 0.36.0'
-  gem.add_development_dependency 'reek', '~> 3.10'
+  gem.add_development_dependency 'rubocop', '~> 1.33'
+  gem.add_development_dependency 'reek', '> 3.10'
 end
diff --git a/spec/model_spec.rb b/spec/model_spec.rb
index 236de79..44e6e99 100644
--- a/spec/model_spec.rb
+++ b/spec/model_spec.rb
@@ -21,7 +21,7 @@
     example do
       expect {
         klass.build one: 'two', foo: :bar
-      }.to raise_exception(NoMethodError, /undefined method `one=' for #<FooModel foo: nil>/)
+      }.to raise_exception(NoMethodError, /undefined method `one=' for .*FooModel/)
     end
   end