diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index f8f62a7639..60314a7def 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -213,4 +213,4 @@ RUBY VERSION
    ruby 3.3.8p144
 
 BUNDLED WITH
-   2.6.7
+   2.5.22
diff --git a/Library/Homebrew/utils/gems.rb b/Library/Homebrew/utils/gems.rb
index e21cf76a2e..7f89f683e1 100644
--- a/Library/Homebrew/utils/gems.rb
+++ b/Library/Homebrew/utils/gems.rb
@@ -10,7 +10,7 @@ Homebrew::FastBootRequire.from_rubylibdir("English")
 module Homebrew
   # Keep in sync with the `Gemfile.lock`'s BUNDLED WITH.
   # After updating this, run `brew vendor-gems --update=--bundler`.
-  HOMEBREW_BUNDLER_VERSION = "2.5.20"
+  HOMEBREW_BUNDLER_VERSION = "2.5.22"
 
   # Bump this whenever a committed vendored gem is later added to or exclusion removed from gitignore.
   # This will trigger it to reinstall properly if `brew install-bundler-gems` needs it.