diff --git a/Library/Homebrew/api.rb b/Library/Homebrew/api.rb
index db13468e4f303..fdf80e98ec039 100644
--- a/Library/Homebrew/api.rb
+++ b/Library/Homebrew/api.rb
@@ -4,6 +4,7 @@
 require "api/analytics"
 require "api/cask"
 require "api/formula"
+require "base64" # TODO: Add this to the Gemfile or remove it before moving to Ruby 3.4.
 require "extend/cachable"
 
 module Homebrew