diff --git a/.rubocop.yml b/.rubocop.yml
index dbf9532b5..c63b76e90 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -115,6 +115,9 @@ Layout/SpaceBeforeFirstArg:
 Layout/SpaceBeforeSemicolon:
   Enabled: true
 
+Layout/SpaceInLambdaLiteral:
+  Enabled: true
+
 Layout/SpaceInsideArrayLiteralBrackets:
   Enabled: true
 
diff --git a/app/models/local_census_record.rb b/app/models/local_census_record.rb
index a14a8fb92..71ead77a7 100644
--- a/app/models/local_census_record.rb
+++ b/app/models/local_census_record.rb
@@ -7,7 +7,7 @@ class LocalCensusRecord < ApplicationRecord
   validates :postal_code, presence: true
   validates :document_number, uniqueness: { scope: :document_type }
 
-  scope :search, -> (terms) { where("document_number ILIKE ?", "%#{terms}%") }
+  scope :search, ->(terms) { where("document_number ILIKE ?", "%#{terms}%") }
 
   private
 
diff --git a/app/models/poll/partial_result.rb b/app/models/poll/partial_result.rb
index d608044cc..02b6906b2 100644
--- a/app/models/poll/partial_result.rb
+++ b/app/models/poll/partial_result.rb
@@ -9,7 +9,7 @@ class Poll::PartialResult < ApplicationRecord
   validates :question, presence: true
   validates :author, presence: true
   validates :answer, presence: true
-  validates :answer, inclusion: { in: -> (a) { a.question.possible_answers }},
+  validates :answer, inclusion: { in: ->(a) { a.question.possible_answers }},
                      unless: ->(a) { a.question.blank? }
   validates :origin, inclusion: { in: VALID_ORIGINS }
 
diff --git a/app/models/poll/question/answer.rb b/app/models/poll/question/answer.rb
index 91320743c..97a002752 100644
--- a/app/models/poll/question/answer.rb
+++ b/app/models/poll/question/answer.rb
@@ -15,7 +15,7 @@ class Poll::Question::Answer < ApplicationRecord
   validates_translation :title, presence: true
   validates :given_order, presence: true, uniqueness: { scope: :question_id }
 
-  scope :by_author, -> (author) { where(author: author) }
+  scope :by_author, ->(author) { where(author: author) }
 
   scope :visibles, -> { where(hidden: false) }
 
diff --git a/app/models/user.rb b/app/models/user.rb
index 73388580b..43927fe39 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -123,7 +123,7 @@ class User < ApplicationRecord
     string = "%#{search_string}%"
     where("username ILIKE ? OR email ILIKE ? OR document_number ILIKE ?", string, string, string)
   end
-  scope :between_ages, -> (from, to) do
+  scope :between_ages, ->(from, to) do
     where(
       "date_of_birth > ? AND date_of_birth < ?",
       to.years.ago.beginning_of_year,
diff --git a/app/models/votation_set_answer.rb b/app/models/votation_set_answer.rb
index c299881b3..7cc3a55cb 100644
--- a/app/models/votation_set_answer.rb
+++ b/app/models/votation_set_answer.rb
@@ -2,5 +2,5 @@ class VotationSetAnswer < ApplicationRecord
   belongs_to :votation_type
   belongs_to :author, -> { with_hidden }, class_name: "User", inverse_of: :votation_set_answers
 
-  scope :by_author, -> (author) { where(author: author) }
+  scope :by_author, ->(author) { where(author: author) }
 end