diff --git a/Gemfile b/Gemfile
index 099d5086b76..f1a65b02aa5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'bump', require: false
 gem 'memory_profiler', platform: :mri
 gem 'rake', '~> 13.0'
 gem 'rspec', '~> 3.7'
-gem 'rubocop-performance', '~> 1.11.0'
+gem 'rubocop-performance', '~> 1.12.0'
 gem 'rubocop-rake', '~> 0.6.0'
 gem 'rubocop-rspec', '~> 2.5.0'
 # Workaround for cc-test-reporter with SimpleCov 0.18.
diff --git a/lib/rubocop/yaml_duplication_checker.rb b/lib/rubocop/yaml_duplication_checker.rb
index e54f8996107..eef9969f008 100644
--- a/lib/rubocop/yaml_duplication_checker.rb
+++ b/lib/rubocop/yaml_duplication_checker.rb
@@ -23,7 +23,7 @@ def self.traverse(tree, &on_duplicated)
       when Psych::Nodes::Mapping
         tree.children.each_slice(2).with_object([]) do |(key, value), keys|
           exist = keys.find { |key2| key2.value == key.value }
-          on_duplicated.call(exist, key) if exist
+          yield(exist, key) if exist
           keys << key
           traverse(value, &on_duplicated)
         end