diff --git a/.rubocop.yml b/.rubocop.yml
index 2eaa7807..dda562cd 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,6 +1,5 @@
 ---
 require:
-  - rubocop-performance
   - rubocop-rake
 
 AllCops:
@@ -31,9 +30,6 @@ Metrics/ModuleLength:
 Metrics/ParameterLists:
   Max: 5
 
-Performance/Casecmp:
-  Enabled: false
-
 Style/CommandLiteral:
   Exclude:
     - 'test_database.rb'
diff --git a/Gemfile b/Gemfile
index 8d4a474a..3311c587 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,5 +10,4 @@ gem 'rspec-its', '~> 1.2'
 
 gem 'codeclimate-test-reporter', '~> 1.0.3', group: :test, require: nil
 gem 'rubocop', '~> 1.56.3', require: false
-gem 'rubocop-performance'
 gem 'rubocop-rake'
diff --git a/lib/lhm/adapter.rb b/lib/lhm/adapter.rb
index 5afd3e60..bff4b777 100644
--- a/lib/lhm/adapter.rb
+++ b/lib/lhm/adapter.rb
@@ -77,7 +77,7 @@ def rename_column(old_name, new_name)
     # @param index_name [String]
     def add_unique_index(columns, index_name = nil)
       options = { unique: true }
-      options.merge!(name: index_name) if index_name # rubocop:disable Performance/RedundantMerge
+      options.merge!(name: index_name) if index_name
 
       migration.add_index(table_name, columns, options)
     end