diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 63610d266c..26960aa5a1 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
     rspec-support (3.10.0)
     rspec-wait (0.0.9)
       rspec (>= 3, < 4)
-    rubocop (1.9.0)
+    rubocop (1.9.1)
       parallel (~> 1.10)
       parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)