diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index afed0421ac..0d591ca9dd 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -66,7 +66,7 @@ GEM
     nokogiri (1.11.7)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
-    parallel (1.20.1)
+    parallel (1.21.0)
     parallel_tests (3.7.1)
       parallel
     parlour (6.0.1)
diff --git a/Library/Homebrew/sorbet/rbi/gems/parallel@1.20.1.rbi b/Library/Homebrew/sorbet/rbi/gems/parallel@1.21.0.rbi
similarity index 97%
rename from Library/Homebrew/sorbet/rbi/gems/parallel@1.20.1.rbi
rename to Library/Homebrew/sorbet/rbi/gems/parallel@1.21.0.rbi
index d205949e4f..3f0253e9e9 100644
--- a/Library/Homebrew/sorbet/rbi/gems/parallel@1.20.1.rbi
+++ b/Library/Homebrew/sorbet/rbi/gems/parallel@1.21.0.rbi
@@ -27,7 +27,7 @@ module Parallel
     def create_workers(job_factory, options, &block); end
     def extract_count_from_options(options); end
     def process_incoming_jobs(read, write, job_factory, options, &block); end
-    def replace_worker(job_factory, workers, i, options, blk); end
+    def replace_worker(job_factory, workers, index, options, blk); end
     def with_instrumentation(item, index, options); end
     def work_direct(job_factory, options, &block); end
     def work_in_processes(job_factory, options, &blk); end
diff --git a/Library/Homebrew/vendor/bundle/bundler/setup.rb b/Library/Homebrew/vendor/bundle/bundler/setup.rb
index 3e03015cbd..76d0688865 100644
--- a/Library/Homebrew/vendor/bundle/bundler/setup.rb
+++ b/Library/Homebrew/vendor/bundle/bundler/setup.rb
@@ -55,7 +55,7 @@ $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/webrobots-0.1.2/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/mechanize-2.8.1/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/method_source-1.0.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/mustache-1.1.1/lib"
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parallel-1.20.1/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parallel-1.21.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parallel_tests-3.7.1/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parser-3.0.2.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rainbow-3.0.0/lib"