diff --git a/Gemfile b/Gemfile
index ca699cc0e..23ae87fd1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem 'rails', '~> 7.0.7'
 
 gem 'bootsnap', require: false
 
-gem 'activeadmin', '~> 2.13.1'
+gem 'activeadmin', '~> 3.2'
 gem 'autoprefixer-rails', '~> 10.4.2.0'
 gem 'cancancan', '~> 3.3.0'
 gem 'carrierwave', '~> 2.2.5'
@@ -47,7 +47,7 @@ gem 'business_time'
 gem 'github_api', '~> 0.18.2'
 gem 'httparty'
 gem 'money-rails', '~> 1.12'
-gem 'ransack', '~> 2.3'
+gem 'ransack', '~> 4.0'
 
 gem 'sidekiq', "~> 6.5.12"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index c2735cd7d..da016ce5f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -88,15 +88,15 @@ GEM
       case_transform (>= 0.2)
       jsonapi-renderer (>= 0.1.1.beta1, < 0.3)
     active_skin (0.0.13)
-    activeadmin (2.13.1)
+    activeadmin (3.2.0)
       arbre (~> 1.2, >= 1.2.1)
-      formtastic (>= 3.1, < 5.0)
-      formtastic_i18n (~> 0.4)
+      formtastic (>= 3.1)
+      formtastic_i18n (>= 0.4)
       inherited_resources (~> 1.7)
-      jquery-rails (~> 4.2)
-      kaminari (~> 1.0, >= 1.2.1)
-      railties (>= 6.1, < 7.1)
-      ransack (>= 2.1.1, < 4)
+      jquery-rails (>= 4.2)
+      kaminari (>= 1.2.1)
+      railties (>= 6.1)
+      ransack (>= 4.0)
     activejob (7.0.7.2)
       activesupport (= 7.0.7.2)
       globalid (>= 0.3.6)
@@ -123,9 +123,9 @@ GEM
       tzinfo (~> 2.0)
     addressable (2.8.5)
       public_suffix (>= 2.0.2, < 6.0)
-    arbre (1.6.0)
-      activesupport (>= 3.0.0, < 7.1)
-      ruby2_keywords (>= 0.0.2, < 1.0)
+    arbre (1.7.0)
+      activesupport (>= 3.0.0)
+      ruby2_keywords (>= 0.0.2)
     ast (2.4.2)
     autoprefixer-rails (10.4.2.0)
       execjs (~> 2)
@@ -249,8 +249,8 @@ GEM
       sassc (>= 1.11)
     foreman (0.87.2)
     formatador (1.1.0)
-    formtastic (4.0.0)
-      actionpack (>= 5.2.0)
+    formtastic (5.0.0)
+      actionpack (>= 6.0.0)
     formtastic_i18n (0.7.0)
     github_api (0.18.2)
       addressable (~> 2.4)
@@ -275,7 +275,7 @@ GEM
       guard (~> 2.8)
       guard-compat (~> 1.0)
       multi_json (~> 1.8)
-    has_scope (0.8.1)
+    has_scope (0.8.2)
       actionpack (>= 5.2)
       activesupport (>= 5.2)
     hashdiff (1.0.1)
@@ -298,11 +298,11 @@ GEM
     image_processing (1.12.2)
       mini_magick (>= 4.9.5, < 5)
       ruby-vips (>= 2.0.17, < 3)
-    inherited_resources (1.13.1)
-      actionpack (>= 5.2, < 7.1)
-      has_scope (~> 0.6)
-      railties (>= 5.2, < 7.1)
-      responders (>= 2, < 4)
+    inherited_resources (1.14.0)
+      actionpack (>= 6.0)
+      has_scope (>= 0.6)
+      railties (>= 6.0)
+      responders (>= 2)
     inline_svg (1.9.0)
       activesupport (>= 3.0)
       nokogiri (>= 1.6)
@@ -347,7 +347,7 @@ GEM
     listen (3.8.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    loofah (2.21.3)
+    loofah (2.22.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     lumberjack (1.2.8)
@@ -361,7 +361,7 @@ GEM
     method_source (1.0.0)
     mini_magick (4.12.0)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.2)
+    mini_portile2 (2.8.5)
     minitest (5.20.0)
     moneta (1.0.0)
     monetize (1.12.0)
@@ -427,8 +427,8 @@ GEM
     public_suffix (5.0.4)
     puma (6.3.1)
       nio4r (~> 2.0)
-    racc (1.7.1)
-    rack (2.2.7)
+    racc (1.7.3)
+    rack (2.2.8)
     rack-proxy (0.7.6)
       rack
     rack-test (2.1.0)
@@ -454,7 +454,7 @@ GEM
       actionpack (>= 5.0.1.rc1)
       actionview (>= 5.0.1.rc1)
       activesupport (>= 5.0.1.rc1)
-    rails-dom-testing (2.1.1)
+    rails-dom-testing (2.2.0)
       activesupport (>= 5.0.0)
       minitest
       nokogiri (>= 1.6)
@@ -472,10 +472,10 @@ GEM
       thor (~> 1.0)
       zeitwerk (~> 2.5)
     rainbow (3.1.1)
-    rake (13.0.6)
-    ransack (2.6.0)
-      activerecord (>= 6.0.4)
-      activesupport (>= 6.0.4)
+    rake (13.1.0)
+    ransack (4.1.1)
+      activerecord (>= 6.1.5)
+      activesupport (>= 6.1.5)
       i18n
     rate_throttle_client (0.1.2)
     rb-fsevent (0.11.2)
@@ -485,7 +485,7 @@ GEM
     regexp_parser (2.8.1)
     request_store (1.5.1)
       rack (>= 1.4)
-    responders (3.1.0)
+    responders (3.1.1)
       actionpack (>= 5.2)
       railties (>= 5.2)
     rexml (3.2.5)
@@ -596,7 +596,7 @@ GEM
       railties (>= 6.0.0)
     tailwindcss-rails (2.0.30-x86_64-linux)
       railties (>= 6.0.0)
-    thor (1.2.2)
+    thor (1.3.0)
     thread_safe (0.3.6)
     tilt (2.2.0)
     timeliness (0.4.5)
@@ -631,7 +631,7 @@ GEM
     websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.6.8)
+    zeitwerk (2.6.12)
 
 PLATFORMS
   aarch64-linux
@@ -646,7 +646,7 @@ DEPENDENCIES
   active_admin_theme
   active_model_serializers (~> 0.10.13)
   active_skin
-  activeadmin (~> 2.13.1)
+  activeadmin (~> 3.2)
   autoprefixer-rails (~> 10.4.2.0)
   barnes
   better_errors
@@ -703,7 +703,7 @@ DEPENDENCIES
   rails-ajax_redirect
   rails-controller-testing
   rails-i18n
-  ransack (~> 2.3)
+  ransack (~> 4.0)
   rollbar
   roo (~> 2.9.0)
   rqrcode
diff --git a/app/models/allocation.rb b/app/models/allocation.rb
index ec444628d..5c25ae020 100644
--- a/app/models/allocation.rb
+++ b/app/models/allocation.rb
@@ -20,19 +20,20 @@ class Allocation < ApplicationRecord
   delegate :name, to: :project, prefix: true, allow_nil: true
   delegate :name, to: :user, prefix: true, allow_nil: true
 
-  scope :ongoing, -> {
+  scope :ongoing, lambda {
     where(ongoing: true, user_id: User.active).order(start_at: :desc)
   }
 
-  scope :finished, -> {
-    where(ongoing: false, user_id: User.active).order(end_at: :desc) }
-  scope :in_period, -> (start_at, end_at) do
+  scope :finished, lambda {
+                     where(ongoing: false, user_id: User.active).order(end_at: :desc)
+                   }
+  scope :in_period, lambda { |start_at, end_at|
     where(
       "daterange(start_at, end_at, '[]') && daterange(:start_at, :end_at, '[]')",
-      start_at: start_at,
-      end_at: end_at
+      start_at:,
+      end_at:
     )
-  end
+  }
 
   def days_until_finish
     return unless end_at
@@ -53,12 +54,21 @@ def self.hourly_rate_currencies
   def user_punches
     project
       .punches
-      .where(user: user)
+      .where(user:)
       .since(start_at)
       .order(from: :desc)
       .decorate
   end
 
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[created_at end_at hourly_rate_cents hourly_rate_currency id ongoing project_id start_at
+       updated_at user_id]
+  end
+
+  def self.ransackable_associations(_auth_object = nil)
+    %w[project user]
+  end
+
   private
 
   def end_before_start?
@@ -66,7 +76,7 @@ def end_before_start?
   end
 
   def unique_period
-    return unless Allocation.in_period(start_at, end_at).where.not(id: id).exists?(user_id: user_id)
+    return unless Allocation.in_period(start_at, end_at).where.not(id:).exists?(user_id:)
 
     errors.add(:start_at, :overlapped_period)
   end
diff --git a/app/models/city.rb b/app/models/city.rb
index dd4a21e8e..d6768f199 100644
--- a/app/models/city.rb
+++ b/app/models/city.rb
@@ -16,4 +16,8 @@ def to_s
   def holidays
     regional_holidays.to_formatted_hash
   end
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[created_at id name state_id updated_at]
+  end
 end
diff --git a/app/models/contribution.rb b/app/models/contribution.rb
index 98a9af0ac..317f47343 100644
--- a/app/models/contribution.rb
+++ b/app/models/contribution.rb
@@ -76,6 +76,15 @@ def update_rejected_reason(rejected_reason = "other_reason", reviewer_id)
   scope :by_created_at_from, ->(date) { where('created_at >= ?', date) if date.present? }
   scope :by_created_at_until, ->(date) { where('created_at <= ?', date) if date.present? }
 
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[created_at description id link notes pending pr_state rejected_reason repository_id
+       reviewed_at reviewer_id state tracking updated_at]
+  end
+
+  def self.ransackable_associations(_auth_object = nil)
+    %w[repository reviewed_by users]
+  end
+
   private
 
   def normalize_description_blank_value
diff --git a/app/models/education_experience.rb b/app/models/education_experience.rb
index 9a683e252..ed20a60ad 100644
--- a/app/models/education_experience.rb
+++ b/app/models/education_experience.rb
@@ -16,4 +16,12 @@ class EducationExperience < ApplicationRecord
                           allow_nil: true
 
   scope :for_user, ->(user_id) { where(user_id:) }
+
+  def self.ransackable_associations(_auth_object = nil)
+    ["user"]
+  end
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[course created_at end_date id institution start_date updated_at user_id]
+  end
 end
diff --git a/app/models/evaluation.rb b/app/models/evaluation.rb
index 7e329468b..daa4a1d31 100644
--- a/app/models/evaluation.rb
+++ b/app/models/evaluation.rb
@@ -21,12 +21,21 @@ class Evaluation < ApplicationRecord
 
   attribute :evaluation_date, :date, default: Time.zone.today
 
-  scope :by_kind, -> (kind) { joins(:questionnaire).merge(Questionnaire.public_send(kind)) }
+  scope :by_kind, ->(kind) { joins(:questionnaire).merge(Questionnaire.public_send(kind)) }
 
   enumerize :english_level, in: {
     beginner: 0, intermediate: 1, advanced: 2, fluent: 3
-  },  scope: :shallow,
-      predicates: true
+  }, scope: :shallow,
+                            predicates: true
+
+  def self.ransackable_associations(_auth_object = nil)
+    %w[answers evaluated evaluator questionnaire]
+  end
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[created_at english_level evaluated_id evaluation_date evaluator_id id observation
+       questionnaire_id score updated_at]
+  end
 
   private
 
diff --git a/app/models/office.rb b/app/models/office.rb
index 6072a77a2..3ad36bda3 100644
--- a/app/models/office.rb
+++ b/app/models/office.rb
@@ -2,7 +2,7 @@
 
 class Office < ApplicationRecord
   has_many :users, dependent: :restrict_with_error
-  has_many :users_without_head, ->(office) {where.not(id: office.head_id)}, class_name: 'User'
+  has_many :users_without_head, ->(office) { where.not(id: office.head_id) }, class_name: 'User'
   belongs_to :head, class_name: 'User', optional: true
 
   validates :city, presence: true, uniqueness: true
@@ -22,4 +22,12 @@ def calculate_score
     users_average_score = users_overall_scores.sum / users_overall_scores.size
     update(score: users_average_score.round(2))
   end
+
+  def self.ransackable_associations(_auth_object = nil)
+    %w[head users users_without_head]
+  end
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[active city created_at head_id id score updated_at users_count]
+  end
 end
diff --git a/app/models/project.rb b/app/models/project.rb
index ad98ba2aa..1b254752e 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -31,4 +31,12 @@ def enable!
   def to_s
     name
   end
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[active created_at id market name updated_at]
+  end
+
+  def self.ransackable_associations(_auth_object = nil)
+    %w[allocations punches]
+  end
 end
diff --git a/app/models/punch.rb b/app/models/punch.rb
index c1c7169b7..4a7aa5889 100644
--- a/app/models/punch.rb
+++ b/app/models/punch.rb
@@ -7,7 +7,7 @@ class Punch < ApplicationRecord
   belongs_to :user
 
   validates_presence_of :from, :to
-  validates [:from, :to], check_time: true
+  validates %i[from to], check_time: true
   validates_with WorkableValidator, if: -> { from.present? && user.present? }
 
   mount_uploader :attachment, AttachmentUploader
@@ -16,12 +16,14 @@ class Punch < ApplicationRecord
   scope :until, ->(time) { where('punches.to <= ?', time) }
   scope :by_days, ->(days) { where('date("punches"."from") in (?)', days) }
   scope :is_extra_hour, -> { where extra_hour: true }
-  scope :from_last_month, -> {
+  scope :from_last_month, lambda {
     current_month = Date.current.change day: 15
     last_month = current_month.prev_month + 1.day
     where from: last_month..current_month
   }
-  scope :filter_by_date, -> (user_id, from, to) { where('user_id = ? AND created_at >= ? AND created_at <= ?', user_id, from.to_datetime, to.to_datetime) }
+  scope :filter_by_date, lambda { |user_id, from, to|
+                           where('user_id = ? AND created_at >= ? AND created_at <= ?', user_id, from.to_datetime, to.to_datetime)
+                         }
 
   delegate :name, to: :user, prefix: true
   delegate :name, to: :project, prefix: true
@@ -29,19 +31,16 @@ class Punch < ApplicationRecord
   def from_time=(time_string)
     @from_time = time_string.presence
     mount_times
-    time_string
   end
 
   def to_time=(time_string)
     @to_time = time_string.presence
     mount_times
-    time_string
   end
 
   def when_day=(date)
     @when_day = date.presence
     mount_times
-    date
   end
 
   def delta
@@ -59,8 +58,8 @@ def date
   end
 
   def sheet
-    as_json(only: [:project_id, :from, :to]).merge(
-      delta: (delta/1.hour).round
+    as_json(only: %i[project_id from to]).merge(
+      delta: (delta / 1.hour).round
     )
   end
 
@@ -68,6 +67,14 @@ def self.total
     all.reduce(0) { |a, e| a + e.delta }
   end
 
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[attachment comment created_at extra_hour from id project_id to updated_at user_id]
+  end
+
+  def self.ransackable_associations(_auth_object = nil)
+    %w[project user]
+  end
+
   private
 
   def mount_time(time_string)
@@ -75,9 +82,9 @@ def mount_time(time_string)
   end
 
   def mount_times
-    unless @when_day.nil?
-      self.to = mount_time(@to_time) unless @to_time.nil?
-      self.from = mount_time(@from_time) unless @from_time.nil?
-    end
+    return if @when_day.nil?
+
+    self.to = mount_time(@to_time) unless @to_time.nil?
+    self.from = mount_time(@from_time) unless @from_time.nil?
   end
 end
diff --git a/app/models/questionnaire.rb b/app/models/questionnaire.rb
index be793d03b..7148fae4f 100644
--- a/app/models/questionnaire.rb
+++ b/app/models/questionnaire.rb
@@ -32,4 +32,12 @@ def toggle_active
   def to_s
     title
   end
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[active created_at description id kind title updated_at]
+  end
+
+  def self.ransackable_associations(_auth_object = nil)
+    %w[evaluations questions]
+  end
 end
diff --git a/app/models/regional_holiday.rb b/app/models/regional_holiday.rb
index 04c0e2e76..0dbcadc5b 100644
--- a/app/models/regional_holiday.rb
+++ b/app/models/regional_holiday.rb
@@ -14,6 +14,14 @@ def cities_names
     cities.pluck(:name).to_sentence
   end
 
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[created_at day id month name updated_at]
+  end
+
+  def self.ransackable_associations(_auth_object = nil)
+    ["cities"]
+  end
+
   private
 
   def valid_date?
diff --git a/app/models/repository.rb b/app/models/repository.rb
index e77467be1..ef4c6f5ae 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -8,10 +8,12 @@ def to_s
   end
 
   scope :with_distinct_languages, -> { group(:language).select(:language).where.not(language: [nil, '']) }
-  scope :by_repository_name_like, ->(repository_name) {
-    if repository_name.present?
-      where("link ILIKE ?", "%#{repository_name}%")
-    end
+  scope :by_repository_name_like, lambda { |repository_name|
+    where("link ILIKE ?", "%#{repository_name}%") if repository_name.present?
   }
   scope :by_languages, ->(languages) { where(language: languages) if languages.present? }
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[created_at description highlight id issues language link stars updated_at]
+  end
 end
diff --git a/app/models/skill.rb b/app/models/skill.rb
index 14bfea0e4..f97d698c5 100644
--- a/app/models/skill.rb
+++ b/app/models/skill.rb
@@ -9,4 +9,8 @@ class Skill < ApplicationRecord
             uniqueness: { case_sensitive: false }
 
   scope :by_title_like, ->(title) { where("skills.title ILIKE ?", "%#{title}%") if title.present? }
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[created_at id title updated_at]
+  end
 end
diff --git a/app/models/talk.rb b/app/models/talk.rb
index 9523e578d..a675b167f 100644
--- a/app/models/talk.rb
+++ b/app/models/talk.rb
@@ -6,6 +6,14 @@ class Talk < ApplicationRecord
   validates :event_name, :talk_title, :date, presence: true
   validate :future_date?
 
+  def self.ransackable_associations(_auth_object = nil)
+    ["user"]
+  end
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[created_at date event_name id talk_title updated_at user_id]
+  end
+
   private
 
   def future_date?
diff --git a/app/models/user.rb b/app/models/user.rb
index 159d7551e..780ad05f8 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -13,26 +13,26 @@ class User < ApplicationRecord
 
   %i[backend_level frontend_level].each do |specialty|
     enumerize specialty,
-      in: { trainee: 6, intern: 0, junior: 1, junior_plus: 2, mid: 3, mid_plus: 4, senior: 5 },
-      scope: :shallow,
-      predicates: true,
-      i18n_scope: 'enumerize.user.level'
+              in: { trainee: 6, intern: 0, junior: 1, junior_plus: 2, mid: 3, mid_plus: 4, senior: 5 },
+              scope: :shallow,
+              predicates: true,
+              i18n_scope: 'enumerize.user.level'
   end
 
   enumerize :occupation, in: {
     administrative: 0, engineer: 1
-    },  scope: :shallow,
-        predicates: true
+  }, scope: :shallow,
+                         predicates: true
 
   enumerize :specialty, in: {
     frontend: 0, backend: 1, devops: 2, mobile: 4, qa: 5
-    },  scope: :shallow,
-        predicates: true
+  }, scope: :shallow,
+                        predicates: true
 
   enumerize :contract_type, in: {
     internship: 0, employee: 1, contractor: 2, associate: 3
-    },  scope: :shallow,
-        predicates: true
+  }, scope: :shallow,
+                            predicates: true
 
   enumerize :contract_company_country, in: { brazil: 0, usa: 1 }
 
@@ -41,7 +41,7 @@ class User < ApplicationRecord
     admin: 2,
     open_source_manager: 3,
     hr: 4,
-    commercial: 5,
+    commercial: 5
   }, multiple: true, predicates: true
 
   belongs_to :office, optional: false
@@ -78,14 +78,14 @@ class User < ApplicationRecord
   scope :allocated,      -> { engineer.active.where(id: Allocation.ongoing.select(:user_id)) }
   scope :by_skills_in,   ->(*skill_ids) { UsersBySkillsQuery.where(ids: skill_ids) }
   scope :not_in_experience, -> { where arel_table[:created_at].lt(EXPERIENCE_PERIOD.ago) }
-  scope :by_roles_in, -> roles {
+  scope :by_roles_in, lambda { |roles|
     roles_values = self.roles.find_values(*roles).map(&:value)
     where("users.roles && ARRAY[?]::int[]", roles_values)
   }
   scope :admin, -> { by_roles_in([:admin]) }
   scope :hr, -> { by_roles_in([:hr]) }
   scope :commercial, -> { by_roles_in([:commercial]) }
-  scope :vacation_managers, -> { by_roles_in([:hr, :commercial]) }
+  scope :vacation_managers, -> { by_roles_in(%i[hr commercial]) }
 
   scope :by_name_like, ->(name) { where("users.name ILIKE ?", "%#{name}%") }
   scope :by_email_like, ->(email) { where("users.email ILIKE ?", "%#{email}%") }
@@ -105,10 +105,23 @@ def self.ransackable_scopes(_auth_object)
     [:by_skills_in]
   end
 
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[active allow_overtime backend_level city_id confirmation_sent_at
+       confirmed_at consumed_timestep contract_company_country contract_type created_at current_sign_in_at
+       email frontend_level github id last_sign_in_at mentor_id name observation occupation office_id
+       remember_created_at roles specialty started_at updated_at]
+  end
+
+  def self.ransackable_associations(_auth_object = nil)
+    %w[allocations authored_notes city contributions education_experiences evaluations
+       managed_offices mentees mentor notes office professional_experiences projects punches skills talks user_skills vacations]
+  end
+
   def self.overall_score_average
     overall_scores = all.map(&:overall_score).compact
 
     return 0 if overall_scores.empty?
+
     (overall_scores.sum / overall_scores.size).round(2)
   end
 
@@ -174,11 +187,9 @@ def update_with_password(params, *options)
     if current_password.blank?
       super
     else
-        errors.add(:password, "não pode ficar em branco") if password.blank?
-        errors.add(:password_confirmation, "não pode ficar em branco") if password_confirmation.blank?
-      if password_confirmation != password
-        errors.add(:password_confirmation, "não é igual a Password")
-      end
+      errors.add(:password, "não pode ficar em branco") if password.blank?
+      errors.add(:password_confirmation, "não pode ficar em branco") if password_confirmation.blank?
+      errors.add(:password_confirmation, "não é igual a Password") if password_confirmation != password
     end
 
     errors.present? ? false : super
diff --git a/app/models/vacation.rb b/app/models/vacation.rb
index 4ae3b6717..edc397aa2 100644
--- a/app/models/vacation.rb
+++ b/app/models/vacation.rb
@@ -15,56 +15,55 @@ class Vacation < ApplicationRecord
     pending: 0,
     approved: 1,
     denied: 2,
-    cancelled: 3,
+    cancelled: 3
   }, predicates: true, scope: :shallow
 
   validates_presence_of :start_date, :end_date, :user
   validates_comparison_of :start_date,
-    message: -> (_vacation, _other) {
-      I18n.t(
-        "activerecord.errors.models.vacation.attributes.start_date.greater_than_current",
-        date: I18n.l(Date.current)
-      )
-    },
-    greater_than: -> (_) { Date.current },
-    allow_nil: true,
-    if: :not_cancelled?
+                          message: lambda { |_vacation, _other|
+                            I18n.t(
+                              "activerecord.errors.models.vacation.attributes.start_date.greater_than_current",
+                              date: I18n.l(Date.current)
+                            )
+                          },
+                          greater_than: ->(_) { Date.current },
+                          allow_nil: true,
+                          if: :not_cancelled?
   validates_comparison_of :end_date,
-    message: -> (vacation, _other) {
-      I18n.t(
-        "activerecord.errors.models.vacation.attributes.end_date.greater_than_current",
-        date: I18n.l(vacation.start_date + MINIMUM_RANGE_OF_DAYS.days)
-      )
-    },
-    greater_than: -> (vacation) { vacation.start_date + MINIMUM_RANGE_OF_DAYS.days },
-    allow_nil: true,
-    if: :not_cancelled?
+                          message: lambda { |vacation, _other|
+                            I18n.t(
+                              "activerecord.errors.models.vacation.attributes.end_date.greater_than_current",
+                              date: I18n.l(vacation.start_date + MINIMUM_RANGE_OF_DAYS.days)
+                            )
+                          },
+                          greater_than: ->(vacation) { vacation.start_date + MINIMUM_RANGE_OF_DAYS.days },
+                          allow_nil: true,
+                          if: :not_cancelled?
   validate :validate_start_date_close_to_weekend, if: :start_date, unless: -> { user.contractor? }
   validates_with HolidayValidator, if: :start_date, unless: -> { !validate_vacation_before_holiday? }
 
-  scope :ongoing_and_scheduled, -> {
+  scope :ongoing_and_scheduled, lambda {
     where(status: :approved)
-    .where("end_date >= :today", today: Date.current)
-    .order(start_date: :asc, end_date: :asc)
+      .where("end_date >= :today", today: Date.current)
+      .order(start_date: :asc, end_date: :asc)
   }
 
-  scope :expired, -> {
+  scope :expired, lambda {
     pending
-    .where("start_date < :today", today: Date.current)
-    .order(start_date: :asc, end_date: :asc)
+      .where("start_date < :today", today: Date.current)
+      .order(start_date: :asc, end_date: :asc)
   }
 
-  scope :pending_approval_of, ->(approver) {
-    unless [:hr, :commercial].include? approver.to_sym
-      raise ArgumentError, "The approver should be :hr or :commercial"
-    end
+  scope :pending_approval_of, lambda { |approver|
+    raise ArgumentError, "The approver should be :hr or :commercial" unless %i[hr commercial].include? approver.to_sym
+
     where("#{approver}_approver_id": nil)
   }
 
-  scope :finished, -> {
+  scope :finished, lambda {
     approved
-    .where("end_date <= :today", today: Date.current)
-    .order(end_date: :desc)
+      .where("end_date <= :today", today: Date.current)
+      .order(end_date: :desc)
   }
 
   def approve!(user)
@@ -82,7 +81,7 @@ def deny!(user)
 
   def cancel!(user)
     update!(status: :cancelled, denier: user)
-  end 
+  end
 
   def cancelable?
     pending? || approved_within_cancel_range?
@@ -92,6 +91,15 @@ def duration_days
     (start_date..end_date).count
   end
 
+  def self.ransackable_associations(_auth_object = nil)
+    %w[commercial_approver denier hr_approver user]
+  end
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[commercial_approver_id created_at denier_id end_date hr_approver_id id start_date status
+       updated_at user_id]
+  end
+
   private
 
   def approved_within_cancel_range?
@@ -107,9 +115,9 @@ def not_cancelled?
   end
 
   def validate_start_date_close_to_weekend
-    if start_date.thursday? || start_date.friday? || start_date.on_weekend?
-      errors.add(:start_date, :close_weekend)
-    end
+    return unless start_date.thursday? || start_date.friday? || start_date.on_weekend?
+
+    errors.add(:start_date, :close_weekend)
   end
 
   def validate_vacation_before_holiday?
diff --git a/spec/admin/contributions_controller.spec.rb b/spec/admin/contributions_controller_spec.rb
similarity index 84%
rename from spec/admin/contributions_controller.spec.rb
rename to spec/admin/contributions_controller_spec.rb
index 95e5ea31e..55fc26d0c 100644
--- a/spec/admin/contributions_controller.spec.rb
+++ b/spec/admin/contributions_controller_spec.rb
@@ -15,8 +15,8 @@
     allow(controller).to receive(:authenticate_user!)
     allow(controller).to receive(:current_user).and_return(admin)
   end
- 
-  describe 'GET index' do 
+
+  describe 'GET index' do
     it 'renders the index template' do
       get :index
       expect(response).to render_template(:index)
@@ -41,8 +41,7 @@
 
     it 'renders the form elements' do
       get :new
-      expect(page).to have_field('contribution[user_id]')
-                  .and have_field('contribution[repository_id]')
+      expect(page).to have_field('contribution[repository_id]')
                   .and have_field('contribution[link]')
     end
   end
@@ -53,18 +52,17 @@
 
     let(:contribution_params) do
       {
-        "link"=>"https://github.com/Codeminer", 
-        "user_id"=>user.id, 
-        "repository_id"=>repository.id
+        "link" => "https://github.com/Codeminer",
+        "user_id" => user.id,
+        "repository_id" => repository.id
       }
     end
 
     context 'with valid params' do
       it 'creates a new Contribution' do
-        
-        expect {
+        expect do
           post :create, params: { contribution: contribution_params }
-        }.to change(Contribution, :count).by(1)
+        end.to change(Contribution, :count).by(1)
       end
 
       it 'assigns a newly created contribution as @contribution' do
@@ -87,13 +85,6 @@
         expect(contribution.link).to eq(contribution_params['link'])
       end
 
-      it 'ensures created contibution received correct user' do
-        post :create, params: { contribution: contribution_params }
-        contribution = Contribution.last
-
-        expect(contribution.user_id).to  eq(user.id)
-      end
-
       it 'ensures created contibution received correct repository' do
         post :create, params: { contribution: contribution_params }
         contribution = Contribution.last
@@ -133,10 +124,9 @@
 
     it 'renders the form elements' do
       get :show, params: { id: contribution_to_show.id }
-      expect(page).to have_content(contribution_to_show.user)
-                  .and have_content(contribution_to_show.link)
+      expect(page).to have_content(contribution_to_show.link)
                   .and have_content(Contribution.human_attribute_name("state/#{contribution_to_show.state}"))
-    end 
+    end
   end
 
   describe 'GET edit' do
@@ -144,7 +134,7 @@
 
     it 'has http status 200' do
       get :edit, params: { id: contribution.id }
-      
+
       expect(response).to have_http_status(:ok)
     end
 
@@ -160,9 +150,9 @@
       let(:contribution) { create(:contribution) }
 
       it 'updates contribution\'s state' do
-        params = { id: contribution.id, state: 'approved'}
+        params = { id: contribution.id, state: 'approved' }
 
-        patch :update, params: params
+        patch(:update, params:)
         expect(response).to redirect_to admin_contribution_path
       end
     end
@@ -173,7 +163,7 @@
       it 'does not update contribution\'s state' do
         params = { id: contribution.id, state: 'approved', rejected_reason: :other_reason }
 
-        patch :update, params: params
+        patch(:update, params:)
 
         expect(contribution.reload.state).to eq('received')
       end
@@ -181,8 +171,8 @@
       it 'redirects to the same page' do
         params = { id: contribution.id, state: 'approved', rejected_reason: :other_reason }
 
-        patch :update, params: params
-        
+        patch(:update, params:)
+
         expect(response).to redirect_to admin_contribution_path
       end
     end
diff --git a/spec/admin/professional_experience.rb b/spec/admin/professional_experience_spec.rb
similarity index 100%
rename from spec/admin/professional_experience.rb
rename to spec/admin/professional_experience_spec.rb
diff --git a/spec/features/admin/evaluations_spec.rb b/spec/features/admin/evaluations_spec.rb
index 0e1520f3c..876bf3f07 100644
--- a/spec/features/admin/evaluations_spec.rb
+++ b/spec/features/admin/evaluations_spec.rb
@@ -82,8 +82,8 @@
       within '#filters_sidebar_section' do
         expect(page).to have_css('label', text: 'Criado em')
 
-        fill_in 'q_created_at_gteq_datetime', with: 9.months.ago
-        fill_in 'q_created_at_lteq_datetime', with: 7.months.ago
+        fill_in 'q_created_at_gteq', with: 9.months.ago
+        fill_in 'q_created_at_lteq', with: 7.months.ago
 
         click_button 'Filtrar'
       end
@@ -114,11 +114,12 @@
   end
 
   describe 'Actions' do
-    let!(:evaluation) { create(:evaluation,
-                               :with_answers,
-                               answer_count: 2,
-                               english_level: 'beginner'
-                              )}
+    let!(:evaluation) do
+      create(:evaluation,
+             :with_answers,
+             answer_count: 2,
+             english_level: 'beginner')
+    end
 
     before do
       visit '/admin/evaluations'
diff --git a/spec/requests/new_admin/questionnaires_controller_spec.rb b/spec/requests/new_admin/questionnaires_controller_spec.rb
index 6bae295b6..4a414317e 100644
--- a/spec/requests/new_admin/questionnaires_controller_spec.rb
+++ b/spec/requests/new_admin/questionnaires_controller_spec.rb
@@ -32,13 +32,13 @@
 
         context 'when title filter is applied' do
           let!(:foo_questionnaire) { create(:questionnaire, title: 'Foo') }
-          let!(:bar_questionnaire) { create(:questionnaire, title: 'Bar') }
+          let!(:bar_questionnaire) { create(:questionnaire, title: 'Weird title') }
 
           it 'returns only the filtered questionnaires', :aggregate_failures do
             get new_admin_questionnaires_path, params: { title: 'foo' }
 
             expect(response.body).to include('Foo')
-            expect(response.body).not_to include('Bar')
+            expect(response.body).not_to include('Weird title')
           end
         end