diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 18f0488..7dac329 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -158,15 +158,6 @@ Style/IfUnlessModifier:
     - 'app/models/notice.rb'
     - 'app/models/user.rb'
 
-# Offense count: 6
-# Cop supports --auto-correct.
-Style/Lambda:
-  Exclude:
-    - 'app/models/app.rb'
-    - 'app/models/problem.rb'
-    - 'config/load.rb'
-    - 'spec/models/notice_observer_spec.rb'
-
 # Offense count: 17
 # Cop supports --auto-correct.
 Style/LeadingCommentSpace:
diff --git a/app/models/problem.rb b/app/models/problem.rb
index 998b711..c7c5ef2 100644
--- a/app/models/problem.rb
+++ b/app/models/problem.rb
@@ -61,7 +61,7 @@ class Problem
   scope :resolved, -> { where(:resolved => true) }
   scope :unresolved, -> { where(:resolved => false) }
   scope :ordered, -> { order_by(:last_notice_at.desc) }
-  scope :for_apps, lambda { |apps| where(:app_id.in => apps.all.map(&:id)) }
+  scope :for_apps, ->(apps) { where(:app_id.in => apps.all.map(&:id)) }
 
   validates_presence_of :last_notice_at, :first_notice_at
 
diff --git a/config/load.rb b/config/load.rb
index 3f6fb7e..d315f39 100644
--- a/config/load.rb
+++ b/config/load.rb
@@ -29,7 +29,7 @@ Errbit::Config = Configurator.run({
   mongo_url:                 %w(MONGOLAB_URI MONGOHQ_URL MONGODB_URL MONGO_URL),
 
   # github
-  github_url:                ['GITHUB_URL', ->(values) {
+  github_url:                ['GITHUB_URL', lambda { |values|
     values[:github_url].gsub(%r{/*\z}, '')
   }],
   github_authentication:     ['GITHUB_AUTHENTICATION'],
@@ -40,7 +40,7 @@ Errbit::Config = Configurator.run({
   github_api_url:            ['GITHUB_API_URL'],
   github_site_title:         ['GITHUB_SITE_TITLE'],
 
-  email_delivery_method:     ['EMAIL_DELIVERY_METHOD', -> (values) {
+  email_delivery_method:     ['EMAIL_DELIVERY_METHOD', lambda { |values|
     values[:email_delivery_method] && values[:email_delivery_method].to_sym
   }],
 
@@ -50,7 +50,7 @@ Errbit::Config = Configurator.run({
   smtp_authentication:       ['SMTP_AUTHENTICATION'],
   smtp_user_name:            %w(SMTP_USERNAME SENDGRID_USERNAME),
   smtp_password:             %w(SMTP_PASSWORD SENDGRID_PASSWORD),
-  smtp_domain:               ['SMTP_DOMAIN', 'SENDGRID_DOMAIN', ->(values) {
+  smtp_domain:               ['SMTP_DOMAIN', 'SENDGRID_DOMAIN', lambda { |values|
     values[:smtp_domain] ||
     (values[:email_from] && values[:email_from].split('@').last) || nil
   }],
diff --git a/spec/models/notice_observer_spec.rb b/spec/models/notice_observer_spec.rb
index 25a3b9a..ec16164 100644
--- a/spec/models/notice_observer_spec.rb
+++ b/spec/models/notice_observer_spec.rb
@@ -1,6 +1,6 @@
 describe "Callback on Notice", type: 'model' do
   let(:notice_attrs_for) do
-    ->(api_key) do
+    lambda do |api_key|
       {
         error_class: "HoptoadTestingException",
         message: "some message",
--
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