diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 58fff27589..93133be0da 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -81,13 +81,16 @@ GEM
     rspec-support (3.9.3)
     rspec-wait (0.0.9)
       rspec (>= 3, < 4)
-    rubocop (0.83.0)
+    rubocop (0.84.0)
       parallel (~> 1.10)
       parser (>= 2.7.0.1)
       rainbow (>= 2.2.2, < 4.0)
       rexml
+      rubocop-ast (>= 0.0.3)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
+    rubocop-ast (0.0.3)
+      parser (>= 2.7.0.1)
     rubocop-performance (1.5.2)
       rubocop (>= 0.71.0)
     rubocop-rspec (1.39.0)