diff --git a/.rubocop.yml b/.rubocop.yml
index 5366e0535..eeeea3dc4 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -646,6 +646,10 @@ Style/SwapValues:
   StyleGuide: '#values-swapping'
   Enabled: true
 
+Style/TopLevelMethodDefinition:
+  Description: 'This cop looks for top-level method definitions.'
+  Enabled: true
+
 Style/TrailingCommaInArguments:
   Description: 'Checks for trailing comma in argument lists.'
   StyleGuide: '#no-trailing-params-comma'
diff --git a/Gemfile b/Gemfile
index c9b1ad029..d5178d2b1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -147,7 +147,7 @@ group :development, :test do
   gem "knapsack_pro", "~> 2.16.0" # Help parallelize Ruby spec builds
   gem "pry-byebug", "~> 3.8" # Combine 'pry' with 'byebug'. Adds 'step', 'next', 'finish', 'continue' and 'break' commands to control execution
   gem "rspec-rails", "~> 5.0" # rspec-rails is a testing framework for Rails 3+
-  gem "rubocop", "~> 1.14", require: false # Automatic Ruby code style checking tool
+  gem "rubocop", "~> 1.15", require: false # Automatic Ruby code style checking tool
   gem "rubocop-performance", "~> 1.11", require: false # A collection of RuboCop cops to check for performance optimizations in Ruby code
   gem "rubocop-rails", "~> 2.10", require: false # Automatic Rails code style checking tool
   gem "rubocop-rspec", "~> 2.3", require: false # Code style checking for RSpec files
diff --git a/Gemfile.lock b/Gemfile.lock
index 882d7f96e..86f7db116 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -650,7 +650,7 @@ GEM
     rspec-retry (0.6.2)
       rspec-core (> 3.3)
     rspec-support (3.10.2)
-    rubocop (1.14.0)
+    rubocop (1.15.0)
       parallel (~> 1.10)
       parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)
@@ -955,7 +955,7 @@ DEPENDENCIES
   rpush-redis (~> 1.1)
   rspec-rails (~> 5.0)
   rspec-retry (~> 0.6)
-  rubocop (~> 1.14)
+  rubocop (~> 1.15)
   rubocop-performance (~> 1.11)
   rubocop-rails (~> 2.10)
   rubocop-rspec (~> 2.3)
diff --git a/app/controllers/registrations_controller.rb b/app/controllers/registrations_controller.rb
index fa061bd73..3d8e6bb8e 100644
--- a/app/controllers/registrations_controller.rb
+++ b/app/controllers/registrations_controller.rb
@@ -12,6 +12,8 @@ class RegistrationsController < Devise::RegistrationsController
     end
   end
 
+  # rubocop:disable Metrics/CyclomaticComplexity
+  # rubocop:disable Metrics/PerceivedComplexity
   def create
     not_authorized unless Settings::Authentication.allow_email_password_registration ||
       SiteConfig.waiting_on_first_user
@@ -45,6 +47,8 @@ class RegistrationsController < Devise::RegistrationsController
       flash[:notice] = "You must complete the recaptcha ✅"
     end
   end
+  # rubocop:enable Metrics/CyclomaticComplexity
+  # rubocop:enable Metrics/PerceivedComplexity
 
   private
 
diff --git a/app/workers/github_repos/repo_sync_worker.rb b/app/workers/github_repos/repo_sync_worker.rb
index 8ff87b789..e5efc15e9 100644
--- a/app/workers/github_repos/repo_sync_worker.rb
+++ b/app/workers/github_repos/repo_sync_worker.rb
@@ -38,11 +38,9 @@ module GithubRepos
              Github::Errors::RepositoryUnavailable
         repo.destroy
       rescue Github::Errors::ClientError => e
-        if e.message.include? "Repository access blocked"
-          repo.destroy
-        else
-          raise e
-        end
+        raise e unless e.message.include?("Repository access blocked")
+
+        repo.destroy
       end
     end
   end
diff --git a/vendor/cache/rubocop-1.14.0.gem b/vendor/cache/rubocop-1.14.0.gem
deleted file mode 100644
index 4beaa6e89..000000000
Binary files a/vendor/cache/rubocop-1.14.0.gem and /dev/null differ
diff --git a/vendor/cache/rubocop-1.15.0.gem b/vendor/cache/rubocop-1.15.0.gem
new file mode 100644
index 000000000..2bbe16518
Binary files /dev/null and b/vendor/cache/rubocop-1.15.0.gem differ